Table of Content

10 December 2020, Volume 59 Issue 23

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Reviews

Recent advance of alkaloids in genus Aconitum

YANG Shun-yi, YUAN Chun-hong, JIANG Gao-hua, CHEN Ye-gao

2020, 59(23):  5-10.  doi:10.14088/j.cnki.issn0439-8114.2020.23.001

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In order to study the chemical constituents and biological activities of Aconitum alkaloids,recent advance of alkaloids in Aconitum plants were understood by consulting the literature about Aconitum plants.The result showed that since 2016,scholars had studied Aconitum and found 57 new alkaloids.The study of biological activity showed that some species and alkaloids had significant activities in anti-viral,anti-inflammatory,anti-tumor,anti-cholinesterase,cardiovascular and anti-TMV activities.It is of great significance to study the alkaloids of Aconitum for the development of new bioactive components and resource protection.

Research progress on selenium enriched fermentation of Lactic acid bacteria

ZHU Jun-yan, LI Huan-mei, WANG Yan-ni, LONG Tong, GAO Wa, ZHAO Xiao, ZHAO Jin-fang

2020, 59(23):  11-14.  doi:10.14088/j.cnki.issn0439-8114.2020.23.002

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As a kind of element enriched probiotics,many lactic acid bacteria(LAB) can absorb inorganic selenium and convert it into organic selenium and elemental selenium.Selenium enriched lactic acid bacteria have outstanding antioxidant,antibacterial,anticancer and antimutagenic properties.The research status of liquid selenium enriched fermentation of different lactic acid bacteria was reviewed,and the selenium enrichment ability of various lactic acid bacteria was analyzed,which provided theoretical support for the breeding and development of selenium enriched lactic acid bacteria.

Research progress on development and utilization of Broussonetia papyrifera

LI Yang, SHI Mei-rong, SHU Wen-bo, HAN Lei, ZHEN Bo

2020, 59(23):  15-19.  doi:10.14088/j.cnki.issn0439-8114.2020.23.003

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Broussonetia papyrifera is a multi-purpose tree species with good medicinal value,economic value and high resistance.In order to understand and utilize the resources of Broussonetia papyrifera more deeply and to realize the better development and popularization of Broussonetia papyrifera,the growth characteristics,genetic evolution,breeding methods,resistance mechanism and gene function of Broussonetia papyrifera were comprehensively analyzed and the development characteristics and potential were also discussed in order to provide a theoretical basis for the development of Broussonetia papyrifera resources and the breeding of improved varieties in China.

The latest research progress on porcine pseudorabies

XIANG Min, XIA Yu, WANG Ding-fa, SHAO Zhi-yong, LI Zhong-xin, RUAN Zheng, ZHANG Si-hua, LIU Kai-wu, WAN Xue-ji, LI Xin-yu, SHI Yong-mei, CHENG Lei

2020, 59(23):  20-23.  doi:10.14088/j.cnki.issn0439-8114.2020.23.004

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:Pseudorabies (PR) infection of pig is an acute contact infectious disease caused by Pseudorabies virus (PRV).The current situation of PR in China,including epidemiology,diagnostic assays,control strategies and challenges of the disease was reviewed in order to provide reference for the prevention,control and eradication of PR in China.

Breeding & Cultivation

Developing restorer line pyramiding different resistant genes to blast and brown planthopper by molecular marker-assisted selection in rice

LI Jin-bo, DU Xue-shu, XIA Ming-yuan, WAN Bing-liang, QI Hua-xiong

2020, 59(23):  24-27.  doi:10.14088/j.cnki.issn0439-8114.2020.23.005

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R022 was used as the receptor parent and GD7 was used as the donor parent to pyramid 4 resistance genes Pi1,Pi2,Bph14 and Bph15 into R650 by molecular marker-assisted selection (MAS).Resistance identification demonstrated that R650 performed resistance to rice blast and brown planthopper.Jufeng 2A/R650,Tianfeng A/R650 and Neixiang 5A/R50,the three hybrid combinations with R650 as restorer line and three sterile lines,performed moderately resistance or moderately susceptible to rice blast and moderately resistance to brown planthopper.Field trial data demonstrated that yields of these three hybrid combinations were higher than or equal to the control hybrid combinations of Jufeng 2A/R022,Tianfeng A/R022,Neixiang 5A/R022 with R022 as recurrent parent under natural field conditions.The combination Jufengyou 650 (Jufeng 2A/R650) was authorized by Hubei Crop Variety Examination and Approving Committee in 2019.

Study on the cultivation yield and economic benefit of water-saving and drought-resistant rice Hanyou 73 as ratooning rice

WEN Jü, YU Wei-pu, XIE Lei, YANG Hong-yong, LIU Mian, WU Yun-zi, XU Hui, XU Guo-hua

2020, 59(23):  28-31.  doi:10.14088/j.cnki.issn0439-8114.2020.23.006

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Compared with Fengliangyouxiang No.1,the water-saving and drought resistant rice Hanyou 73 was cultivated as ratoon rice,and the difference of yield and economic benefit under dry and water pipe conditions was compared.The results showed that the yield of Hanyou 73 in the first season was significantly higher than that of Fengliangyouxiang No.1 in the dry management condition,while the yield in the regeneration season was significantly lower than that of Fengliangyouxiang No.1,and the total yield was the same,consistent with the conclusion under water pipe condition.In terms of economic benefits,Hanyou 73 was slightly lower than Fengliangyouxiang No.1 under dry management condition,and water pipe condition.There is no significant difference between the two.In conclusion,Hanyou 73 can be used as ratoon rice variety in Jianghan Plain,especially in arid climate.

Discussion on suitable transplanting seedling age and sowing date of “four special” late Indica rice series combinations

LI Xing-hua, CAI Xing-xing, WANG Huan, ZHANG Sheng, ZHOU Qiang, ZHOU Nan

2020, 59(23):  32-37.  doi:10.14088/j.cnki.issn0439-8114.2020.23.007

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The “four special”late indica rice series combinations has short heading date,poor elasticity of seedling age,and easy to early spike when the seedling age was long,so the yield advantage was difficult to give full play.In order to prevent early ear of “four special”late Indica rice series combinations in production,experiments were carried out with different seedling age and sowing date using three “four special”late Indica rice combinations.The results showed that the highest yield was found in the treatment with 20-day-old seedling age.The most effective panicles per unit area was found in the treatment with 15-day-old seedling age,which was not significantly different with 20-day-old seedling age and 25-day-old seedling age,but significantly higher than 35-day-old seedling age(P<0.05).The seed setting rate and 1 000-grain weight had no significant difference between 30-day-old seedling age and 35-day-old seedling age,but most were significantly lower than 15-day-old seedling age and 20-day-old seedling age(P<0.05).The early ear had already occurred when the seedling age reached 25 days,and was serious when the seedling age more than 30 days.The suitable transplanting seedling age was 15 to 25 days and the most suitable transplanting seedling age was 20 days for “four special”late Indica rice series combinations.According to the safe full-ear and maturity date and the accumulated temperature required for growth period,the sowing of “four special”late Indica rice series combinations could be delayed until June 30 to shorten the seedling age and minimize the effect of seedling age on yield.

Some characters of water-saving and drought-resistant rice combinations under water and dry cultivation conditions

ZHOU Qiang, WANG Huan, LI Xing-hua, ZHANG Sheng, CAI Xing-xing, ZHOU Nan

2020, 59(23):  38-40.  doi:10.14088/j.cnki.issn0439-8114.2020.23.008

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A field experiment with Hanyou 804,Hanyou 649,Hanyou 650 and Hanyou 813 as materials was conducted in 2019,the control was Hanyou 73 and Fengliangyou No.4 under water and dry cultivation conditions,respectively.Some characters of water-saving and drought-resistant rice (Oryza sativa L.) combinations under water and dry cultivation conditions were observed.The results showed that the yield of water-saving and drought-tolerant rice increased by 4.86% to 36.60% and -1.47% to 3.51% compared with control (Hanyou73 and Fengliangyou No.4) under dry cultivation and water condition,respectively.Compared with water cultivation condition,chalky grain rate of water-saving and drought-tolerant rice was decreased significantly under dry cultivation condition,but amylose content was increased.In addition,the whole growth period of water-saving and drought-tolerant rice under dry cultivation condition was about 10 days longer than that of water cultivation condition.

Seedling quality and grain yield of rice to optimized seedling raising methods

LI Zhi-xiang, TANG Ji-chao, WU Zhao-hui, HOU Wei, WU Shan, LU Bi-lin

2020, 59(23):  41-45.  doi:10.14088/j.cnki.issn0439-8114.2020.23.009

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To solve the problems of soil acquisition difficulties,low quality of seedlings,w eak root twisting power,late greening and slow growth after transplanting in the industrialized rice seedling raising of the rice-wheat rotation area in North Central Hubei Province,Specifically,three different seedling raising methods were tested to study the effect of optimized seedling raising methods on seedling quality and grain yield:bast fiber mulching film combined with nutrient soil for seedling raising and mechanical transplanting (T1),bast fiber mulching film combined with organic matrix and chemical control for seedling raising and mechanical transplanting (T2) andbast fiber mulching film combined with organic matrix and nutrient soil mixed for seedling raising and mechanical transplanting (T3).Nutrient soil for seedling raising and mechanical transplanting (CK1) and water cultivation of seedling and artificial transplanting (CK2) were used as the controls.The results showed that compared with CK1,CK2 and T1 treatments,the seedlings quality of T2 and T3 treatments were higher,the tillering speed and the dry matter accumulation in the early growth stage after transplanting were faster,the leaf area index and SPAD value in each growth period were larger,andits effective panicle number,seed setting rate and grain yield increase.The grain yield of T2 and T3 treatments increased by 6.70%~6.95% compared to CK1 treatment,reaching a significant level;and increased by 4.90%~5.14% compared to CK2 treatment,reaching a significant level.The results indicated that the seedling raising methods of T2 and T3 can improve seedling quality and increase grain yield.

Simplified cultivation techniques and green prevention control of high-grade rice variety Huangkexiang No.5

CHEN Jie, CHEN Zhan-peng, TU Jun-ming, CAI Zheng-jun, CAO Zhi-gang, ZHANG Qun, JIN Hong-mei, ZHANG Wen-chao, LI Cheng-fang, HUA Hong-xia, CAI Wan-lun

2020, 59(23):  46-47.  doi:10.14088/j.cnki.issn0439-8114.2020.23.010

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Huangkexiang No.5 is a cultivated high-grade rice variety breed by Huanggang Academy of Agricultural Sciences,which is improved the resistance to blast and high quality conventional of Yuzhenxiang.The cultivation techniques and green prevention and control were studied,to tap the potential of increasing yield,improve the quality of rice and in crease the planting efficiency,and to provide the technical support for the demonstration and promotion of the key technologies of green and low-carbon direct seeding rice cultivation and the cultivation mode of cost-saving,high-yield and high-efficiency.

Effects of planting density and nitrogen application on yield and related characters of direct-seeded cotton variety Gangmian 11

ZHAO Shu-qi, YAN Zhen-hua, ZHANG Hua-chong, LI Wei, HUANG Xiao-li, DAI Bao-sheng

2020, 59(23):  48-50.  doi:10.14088/j.cnki.issn0439-8114.2020.23.011

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In order to provide theoretical support for the popularization and application of direct-seeded cotton Gangmian 11,three densities and five nitrogen fertilizer treatments were used to study the effects of density and nitrogen application on the yield and related characters in eastern Hubei province.The results showed that in a certain range,with the increasing of nitrogen application,the yield of Gangmian 11 increased.When the nitrogen application was higher than 112.5 kg/hm²,the yield was lower than that under this nitrogen application level.when the high density treatment was 82 500 plants/hm²,the yield was the highest,and there was no significant difference between the high density treatment and the medium density treatment of 71 250 plants/hm².To sum up,in eastern Hubei province,to obtain high yield,the density was controlled at 72 000 plants/hm² to 82 000 plants/hm² and the nitrogen application could be reduced to 112.5 kg/hm².

Effect of no nitrogen application on growth and yield of different broom corn millet varieties

LUO SHi-wu, CHENG Bing-wen, YANG Jun-xue, WANG Yong, ZHANG Shang-pei, LI Kai

2020, 59(23):  51-54.  doi:10.14088/j.cnki.issn0439-8114.2020.23.012

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Eight broom corn millet (Panicum millaceum L.) varieties were treated with no nitrogen and normal nitrogen application,in order to study the effects of low nitrogen stress on dry matter above ground,root volume,chlorophyll content (SPAD) in leaves and yield of different broom corn millet varieties.The results showed that no nitrogen stress had effects on dry matter above ground,root volume and yield of different broom corn millet varieties during growth,and the differences were obvious between treatments,and the nitrogen use efficiency of different broom corn millet was also different.Among them,the yield of Yanshu No.8 had lower tolerance to low nitrogen stress index,and higher contribution rate of nitrogen fertilizer to yield,indicating that this variety has higher dependence on nitrogen,and more sensitive to low nitrogen stress.The yield of Ningmi 14 had higher tolerance to low nitrogen stress index,and higher contribution rate of nitrogen fertilizer to yield,indicating that this variety has less dependence on nitrogen and stronger tolerance to low nitrogen.

Effects of paclobutrazol at different concentrations on economic traits and yield of rape

LIU Nian, TANG Tian-ze, ZHONG Si-cheng, LI Bin, FAN Qi-xin, MENG Da-qing, LI Ying-chun, LI Zhi-fan, CHEN Jun

2020, 59(23):  55-57.  doi:10.14088/j.cnki.issn0439-8114.2020.23.013

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Using Guohaoyou No.8 as a test material,the effect of spraying paclobutrazol at different concentrations during the rape (Brassica napus L.) bud period was studied.The results showed that rapeseed could not only cultivate strong seedlings,improve plant type structure and yield characteristics,but also effectively solve the problem of rape lodging when spraying paclobutrazolin.The number of carob fruits per plant,the number of grains per grain,the weight of the rapeseed,and yield of Guohaoyou No.8 was increased by spraying with 1 500 grams of 15% paclobutrazol wettable powder per hectare during the bud period.

The effect of flooded treatment on the enrichment of arsenic in rice

YANG Yang, GAO Li-li, ZHANG Hui, LYU Xiao

2020, 59(23):  58-62.  doi:10.14088/j.cnki.issn0439-8114.2020.23.014

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The arsenic(As) concentration in soil and As enrichment in rice (Oryza sativa L.)were studied under different flooded treatment using pot experiments.The results showed that As in soil solution mainly existed as As(III) and its concentration increased with flooded time for flooded treatment in whole rice growing (F).The As concentration was low and mainly existed as As(V) for unflooded treatment in whole rice growing(NF).When soil were aerobic and flooded for FNF and NFF treatments after flowering,As in soil solution decreased and increased markedly,respectively.At the stem extension,weight of rice was not affected by different flooded treatment.But As concentration was much lower in unflooded rice than in flooded rice.Grain weight in the different flooded treatment followed the decreased order of NFF,F,NF and FNF.As concentrations in grain,straw and empth grain followed the decreased order of F,FNF,NFF,NF.While the order of As concentrations in rice tissues from highest to lowest were straw,empth grain and grain.

Resource & Environment

Analysis on water environment protection of historic and cultural towns and villages in north China: A case of ancient Guangfu town, Hebei province

ZHANG Da, LI Jia-le, DU Jin-jin, ZHANG Guang-yi

2020, 59(23):  63-67.  doi:10.14088/j.cnki.issn0439-8114.2020.23.015

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Complete protection of water environment of historical and cultural villages and towns is an important issue for the protection and utilization of cultural heritage.By collecting water sample from peripheral ponds and moats,pools and residents' drinking water in typical ancient Guangfu town in north China,and taking advantage of grey relational appraise method,it found that the water environment of ancient Guangfu town was in line with the characteristics of that in Chinese traditional ancient towns and villages.Sanitary sewage,livestock wastewater and runoff and drainage of farmland as well as travelling of tourists were main contaminative sources.Water supply and drainage infrastructure was imperfect and point source pollution was the main form of pollution.In addition,tourists were also one of the factors affecting the water environment of the ancient town.According to the results of analysis,the thesis thus initially proposes measures were put forword to solve water environmental problems.The above research provides relevant basis for the proper protection of water environment of historical and cultural villages,thus to pave the way for improvement of the quality of the connotation of ancient Guangfu town and construction of beautiful country.

Collaborative control of water pollution of river basin based on four dimensions

ZHANG Zhu-ye, LIU Zhong-lan

2020, 59(23):  68-72.  doi:10.14088/j.cnki.issn0439-8114.2020.23.016

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Water resources have typical characteristics of quasi-public and externality.However,because water resources in a river basin are divided by different administrative regions,regional conflicts of interest and disputes over pollution control are easy to occur in their jurisdiction and governance,thus hindering the process of water pollution control in the river basin.Therefore,how to establish a collaborative governance mechanism,coordinate the interest relations and conflicts among the main bodies,and compensate the adverse effects brought by the division of public property of water resources and administrative system is of great significance for the water pollution control in the river basin.Based on the existing theoretical basis,this paper analyzes the practical reasons for the dilemma of water pollution control in the river basin,including the defects of the governance system and mechanism as well as the unsound legal system.It is concluded that a new model of collaborative governance should be established,including system collaboration,power collaboration,platform collaboration and consciousness collaboration.

Temporal and spatial variation analysis of soil salinization in Yinbei irrigation area of Ningxia from 1989 to 2019

WU Xia, WANG Zhang-jun, FAN Li-qin, LI Lei, ZHANG Yong-hong

2020, 59(23):  73-76.  doi:10.14088/j.cnki.issn0439-8114.2020.23.017

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Yinbei irrigation area of Ningxia was choosed as the research object and remote sensing image was taken as the data source.Based on the classification maps of soil salinization types in Yinbei region in 1989,1999,2009 and 2019,the spatial statistical analysis method was used to analyze the evolution characteristics of soil salinization in the study area.The results showed that,from the perspective of time change,the salinized cultivated land in Yinbei region showed an increasing trend from 1989 to2019,with a large increase form 1989 to 2009 and a small increase from 2009 to 2019;From the perspective of spatial evolution,the degree of salinization gradually transits from centralized distribution to fragmented distribution;From the perspective of transfer matrix,the transformation of soil salinization types in Yinbei region from 1989 to 2019 was relatively large for the complexity,the transfer area between non salinized cultivated land and light to moderate salinized cultivated land was large.

The dynamic prediction for rapeseed yield based on influence index for bumper or poor harvest from historic meteorological yield in Sichuan basin area

ZHAO Yi, ZOU Yu-jia, ZHANG Yu-fang

2020, 59(23):  77-80.  doi:10.14088/j.cnki.issn0439-8114.2020.23.018

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As one of nationʼs big producers of rapeseed(Brassica napus L.),timely and accurate yield forecasts has great significance to ensure national grain and oil security in Sichuan province.In order to determine the type of historically similar years,the rape yield data and daily meteorological data from 1983 to 2012 at 30 stations in Sichuan basin area,as well as growth period of 13 agricultural meteorological observatory data were used to set up a comprehensive diagnostic index which based on correlation coefficient and Euclidean distance.By analyzing the relationship between meteorological influence index of rape yield in forecast year and similar year in history,the dynamic prediction method of rape yield in Sichuan basin area was determined.The results showed that the average accuracy of dynamic trend prediction was equal or above 80%,and the average accuracy of basin integration was equal or above 70%.The average precision of dynamic quantitative prediction in each producing area of Sichuan basin was equal or over 89.37%,and the average precision of basin integration was equal or over 96.16%.The precision of dynamic quantitative prediction in each producing area of Sichuan basin was equal or over 89.11%,and the precision of basin integration was equal or over 95.84%.The forecast results indicate that the method has good performance of accuracy to apply and can be applied to actual service.

Horticulture & Local Products

Prediction model of tobacco leaf sensory comfort based on chemical composition

YAN Tie-jun, CHEN Si-meng, ZHOU Hong-shen, XU Zi-cheng, PANG Zhe, LIU Wen-feng, PAN Ting-ting, SHAO HUI-fang

2020, 59(23):  81-86.  doi:10.14088/j.cnki.issn0439-8114.2020.23.019

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To improve the effectiveness of evaluation of cigarette sensory quality comfort,170 standard samples of flue-cured tobacco in China's main tobacco-producing areas in 2019 were selected as materials.Based on the conventional chemical components and polyphenol compounds in the tobacco leaves,the descriptive statistics and simple correlation analysis were first used to analyze the chemical components.Then,the principal component analysis method was used to screen the chemical components,and then the stepwise regression analysis method was used to establish a model for the prediction of cigarette sensory comfort.Results showed that,compared with the real value,the prediction result obtained by the model had smaller error,and the result was relatively stable.Which indicate that the prediction model of tobacco sensory comfort established by principal component-stepwise regression analysis method has high accuracy and feasibility.

Influence of different nutrient solution formulations on hydroponic Syngonium podoopphyllum cv. White Butterfly

GUO Cong, GUAN Wei, ZENG Xiang-guo, HAN Yong-chao, ZHANG Qing-hua, WANG Jian-rong, XIANG Fa-yun

2020, 59(23):  87-93.  doi:10.14088/j.cnki.issn0439-8114.2020.23.020

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In order to explore the formula of large and medium nutrient solution suitable for hydroponic Syngonium podophyllum cv.White Butterfly,five common plant hydroponic nutrient solution formulations and one self-modulated formula were selected in the experiment.With clear water as the control,the growth status of S.podophyllum cv.White Butterfly and its hydroponic solution changes were observed and recorded under seven treatments.Then the formula proportion of large and medium amount of nutrient solution suitable for hydroponic S.podophyllum cv.White Butterfly was selected.The results showed that hydroponic culture could effectively promote the growth of S.podophyllum cv.White Butterfly.The addition of nutrient formula had little obvious effect on the root elongation and plant height growth,but had significant effect on other growth indexes.The self-modulated formula could promote the lateral root growth,the leaf growth and the increase of plant width.The Yamazaki hydroponic mitsuba formula could effectively promote the extraction of adventitious roots and the increase of crown width.The SCAU leaf vegetable B formula,the Yamazaki hydroponic mitsuba formula and the self-modulated formula could maintain and promote the new leaf development rate.However,the modified Hoagland formula,the Japan Enshi formula and the general formula for foliage plants were not suitable for the hydroponic S.podophyllum cv.Write Butterfly due to the unsatisfactory effect on plant root system and leaf spreading.Although the excellent nutrient solutions can promote the growth of hydroponic S.podophyllum cv.Write Butterfly,the pH value and electrical conductivity of these nutrient solutions in use still need to be further optimized and adjusted in the later stage to maintain the stability of the solution.

Comparison test of greenhouse cultivation of seven bitter gourd varieties

JIANG Yan-yan, CHEN Zhan-peng, YAN Liang, GE Chang-jun, XU Li-rong, DAN Jun-fen

2020, 59(23):  94-96.  doi:10.14088/j.cnki.issn0439-8114.2020.23.021

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The growth period,growth potential,fruit characters and yield of seven bitter gourd(Momordica charantia L.) varieties were compared in greenhouse.The results showed that the comprehensive characters of Qingfengwang and Changqing were better,which could be used as early maturing varieties in greenhouse of Huanggang suburban vegetable base;Duruanlianggua-1 and Heikugua-1 can enrich residents' vegetable basket as later autumn varieties,and the relevant cultivation techniques need further study.

Study on technique of modeling Forsythia suspensa as mantis

WANG De-fang, ZHENG Zhi-yong

2020, 59(23):  97-100.  doi:10.14088/j.cnki.issn0439-8114.2020.23.022

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Selecting Forsythia suspensa as the test material and mantis as the creative theme,Paratenodera sinensis Saussure,female imago of Chinese Broadsword Mantis common in China was chosen as bionic object.Catching the habitual movement before hunting,the bionic art design of the external form of trees was carried out around the features.Shrubs that have been grown for four years were selected for directional planting in the center of the mold,and the image modeling was made by pruning and binding process.Then interesting garden landscape was built with green sculpture always presented as vivid mantis by careful maintenance.

Research report on lotus industry development in Hubei province

LI Feng, ZHOU Xiong-xiang, KE Wei-dong, HUANG Xin-fang, ZHU Hong-lian, ZHONG Lan, ZONG Yi-xiang, WU Man, PENG Jing, LI Shuang-mei, YUAN Tian-yao

2020, 59(23):  101-106.  doi:10.14088/j.cnki.issn0439-8114.2020.23.023

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In Hubei province,lotus(Nelumbo nucifera Gaertn.) is mainly cultivated in the wetland of Jianghan plain and its surrounding low hills,with a planting area of over 96 300 hm² and a primary product yield of 1.7 million tons,with an output value of nearly 6 billion RMB in 2019;The processing capacity of lotus product is about 250 000 tons,and the output value is about 5 billion RMB;New cultivars,new cultivation techniques,new cultivation patterns and new equipments of lotus have been applied in production areas with remarkable economic benefits;The management main bodies of the lotus have grown stronger and played a leading role in promoting the integrated development of three industries of lotus.There are some problems in lotus industry,such as lack of high quality and disease-resistant cultivars,low seedling quality,large amount of chemical fertilizer,shortage of labor,lag in intensive processing and insufficient exploration of lotus cultural value,etc.It is suggested to strengthen the work in policy support,scientific and technological innovation,intensive processing,brand building and integration of the three industries.

Screening of extreme germplasms with stone cell content traits in pear

FAN Jing, CHEN Qi-liang, YANG Xiao-ping, ZHANG Jing-guo, HU Hong-ju

2020, 59(23):  107-109.  doi:10.14088/j.cnki.issn0439-8114.2020.23.024

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In order to strengthen the exploitation and utilization of excellent characters in pear germplasms,the stone cell content of 853 pear flesh was detected and analyzed.The results showed that,the stone cell content was 0.043%~4.764%,the average value was 0.812%,the coefficient of variation was 68.72%,the median value was 0.694%.17 extremely low germplasm resources with stone cell content less than 0.1% and 10 extremely high germplasm resources with stone cell content more than 2.5% were screened out.These specific resources could be used in pear breeding,genetic population construction and lignin metabolism research,so as to improve the utilization efficiency of germplasm resources.

Study on mechanism of Arisaema consanguineum anti-cancer based on network pharmacology

HAO Ai-ping, WU Qi-kang, GUO Hui-yan, XUE Ju-kun, WEI Ji-cheng, REN Ru-yi

2020, 59(23):  110-115.  doi:10.14088/j.cnki.issn0439-8114.2020.23.025

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This study used the method of network pharmacology to study the anticancer mechanism of Arisaema consanguineum.The active components and targets of Arisaema consanguineum were searched using the TCMSP database,and these targets were uniformly named using the Uniprot database.Cytoscape 3.7.1 was used to establish a compound-anti-cancer target visualization network map,and the STRING database was used to construct the PPI network.Enrichment pathway analysis was performed using the DAVID website and the ImageGP database.Bioprocess analysis was performed using ClueGo software.The results showed that,a total of 42 anti-cancer active components and 65 anti-cancer targets were collected.The main anticancer active substances of Arisaema consanguineum include terpineol and linoleic acid.Important anti-cancer targets are ADH1B,ADH1C and the like.Arisaema consanguineum can show the multi-component,multi-target and multi-pathway anticancer function by by regulating TNF signaling pathways and p53 signaling pathways through biological processes such as participation in neuroactive ligand-receptor interactions and cancer processes.

Animal Husbandry & Veterinary Medicine

Analysis on ruminal environment and rumen bacterial diversity of grazing Dongbao blackhead goats in grass withering period

ZHANG Nian, YANG Qian-ping, TAO Hu, XIONG Qi, LI Xiao-feng, CHEN Ming-xin, SUO Xiao-jun

2020, 59(23):  116-121.  doi:10.14088/j.cnki.issn0439-8114.2020.23.026

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The aim of this experiment was to study ruminal environment and rumen bacterial diversity of grazing Dongbao blackhead goats in grass withering period.The forge grass were collected and the common nutrition contents were determined.Six healthy annual grazing Dongbao blackhead goats (3 males and 3 females) with the body weight of (45.24±1.25) kg were selected and marked using ear tags with numbers,and the rumen fluids of them were collected via oral cavity before free-range with empty stomach in grass withering period to measured the ruminal environment parameters and rumen microbial diversity.The results showed that the pH of rumen fluid of Dongbao blackhead goats was 6.65,the concentration of ammonia nitrogen (NH₃-N) was 50.30 mg/L,and the ratio of acetic acid/propionic acid was 4.43.A total of 290 868 valid 16S rDNA sequences and 479.67 operational taxonomic unit (OTU) across 6 samples were obtained.The richness indexes Ace and Chao1 indexes of ruminal bacterial were 533.79 and 523.31,respectively,and alpha diversity indexes Shannon and Simpson indexes were 6.39 and 0.96,respectively.The rumen bacteria of grazing Dongbao blackhead goats belonging to 15 phyla,23 classes,29 orders,34 families and 87 genera were identified via taxonomic summary.Among these rumen bacterial populations,the dominant bacterial phyla were Bacteroidetes (75.75%) and Firmicutes (15.62%).The dominant bacterial families were Rikenellaceae (45.89%),Prevotellaceae (19.18%).Rikenellaceae_RC9_gut_group (45.64%) and Prevotella_1 (15.46%) were the dominant bacterial genera.In conclusion,the rumen bacterial diversity of grazing Dongbao blackhead goats was low in grass withering period,and the ratio of acetic acid/propionic acid was high.Bacteroidetes is the predominant phylum and Firmicutes is the second most abundant phylum.Rikenellaceae_RC9_gut_group is the most abundant genus in the rumen bacterial community.

Study on the body size and carcass traits of the Jianghan chicken,recessive white feather broiler and the progeny of their hybrid

SHEN Jie, HUANG Tao, WU Yan, PI Jin-song, PAN Ai-luan, LIANG Zhen-hua, SUN Jing, ZHANG Hao, PU Yue-jin

2020, 59(23):  122-125.  doi:10.14088/j.cnki.issn0439-8114.2020.23.027

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In order to meet the diversification of consumer tastes,the breeding enterprises gradually focus on the identification of the characteristics of Chinese indigenous chicken which could be used for genetic improvement with commercial strains.In this study,a hybrid experiment was designed to explore the body growth weights gain,body size and carcass traits of the progeny of reciprocal cross of the recessive white feather broiler and the jianghan chicken.The results showed that compared to the jianghan chicken,the growth weights gain of offsprings derived from jianghan chicken as father was obvious increased.Besides,the body size and carcass traits of the offsprings were ranged in the Jianghan chicken and recessive white broilers,and the modes of the reciprocal cross could significantly affect the body size and carcass traits of the cocks rather than hens.

Breeding of Jianghan chicken A strain

PAN Ai-luan, WU Yan, SHEN Jie, DU Jin-ping, CAI Chuan-peng, PI Jin-song, ZHANG Hao, HUANG Tao, PU Yue-jin, DUAN Jun, HUANG Zhu-lin, SUN Jing, LIANG Zhen-hua

2020, 59(23):  126-129.  doi:10.14088/j.cnki.issn0439-8114.2020.23.028

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The breeding of Jianghan chicken A strain was studied for 4 generations by modern breeding methods for whole family and MAS,with Jianghan chicken as the basic breeding material,high-yield genes were introduced.The results showed that the feather characteristics of Jianghan chicken A strain were basically stable,with 100% of may-feather chicken.For the core group of generation 4,the age of 50% of egg production was 7 d in advance;Body weight at age of 300 days was improved by 139.10 g and 90.81 g for cock and hen,respectively;The average egg weight of generation 0 was 51.26 g,and that of generation 4 was 50.28 g.The egg production number of generation 4 was 104.35,increased by 9 compared with generation 0;The proportion of green-shell eggs in the observation groups of generation 3~4 was over 99%,and it was 100% in core groups for generation 0~4.The proportion of green-shell eggs can be precisely controlled by MAS in commercial stocks.

Effect of epigallocatechin gallate on lipid deposition and liver anti-oxidative capacity in heat-stressed broilers

LI Zhen-jun, WU Han, YANG Ye

2020, 59(23):  130-133.  doi:10.14088/j.cnki.issn0439-8114.2020.23.029

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This study aims to investigate the effects of EGCG on the lipid deposition and liver anti-oxidative capacity of broilers under heat stress.One hundred and ninety-two 2-wk-old broilers were divided into four groups with 6 replicates per group and 8 chickens per replicate.One thermoneutral control group (28°C,TN group),which was fed the basal diet;And three cyclic high-temperature groups (35°C from 7:00 to 19:00;28°C from 19:00 to 7:00,heat stress (HS) group),which were fed the basal diet with added EGCG at doses of 0 mg/kg (HS0 group),300 mg/kg (HS300 group),and 600 mg/kg (HS600 group),respectively.The growth performance and liver metabolism and lipid deposition indices were performed at 35 d of age.The results showed that heat stress significantly reduced body weight,daily weight gain,daily feed intake,and decreased the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px),and the Nrf2 mRNA expression in liver,and increase significantly the levels of malondialdehyde (MDA) and the expression of LITAF,NF-κB,FAS,SREBP1 mRNA and the lipid deposition compared with TN group.EGCG (HS300 and HS600 group) increased the activities of SOD and GSH-Px and catalase (CAT),and increased the Nrf2 mRNA expression,and decreased the MAD contents,and reduced the lipid deposition and expression of LITAF,NF-κB,FAS,SREBP1 mRNA.The results of this study show that EGCG can improve liver antioxidative capacity to alleviate oxidative damage caused by heat stress.

Analysis on the safety of livestock manure applied to the field in Hubei province

RAN Zhi-ping, LIU Ming, TAO Li-wen, WEN Jiang-hui, ZHOU Qi, DENG Bing, GAO Qi-shuang, PENG Xia, TAN Jun-jun, SHAO Zhong-bao, PU Zhen-yu

2020, 59(23):  134-138.  doi:10.14088/j.cnki.issn0439-8114.2020.23.030

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In order to promote the security of manure application to field,this study estimated the suitable area of cropland needed by manure application,total nitrogen and phosphorus load of cropland and the potential of using manure from growth of main crops in Hubei province.The results showed that,planting rice called for smallest cropland area for reusing manure.In the other word,rice owned the strongest capacity to take manure nitrogen and phosphorus away from field.From the perspective of regulation of fecal pollution,the manure nitrogen and phosphorus load per unit area of arable land in Huanggang city were maximum in Hubei province,and they had surpassed the EU′s standard of limitation on nitrogen and phosphorus which were 170,35 kg/hm²,respectively.Closely followed by Ezhou and Xiangyang city,which should be focused on.From the potential of manure application to field,less space was left for manure application in Shennongjia Forestry District,Huanggang city and Enshi city.Therefore,the total amount of livestock and the proportion of manure applied to cropland should be controlled in these regions.

Storage & Processing

The technology of producing and optimizing biochemical fulvic acid utilizing straw

GAO Xi-long, HAN Meng-qi, HUANG Ming-hui, ZHANG Qian-ru, LI Hua, LUO Xing

2020, 59(23):  139-142.  doi:10.14088/j.cnki.issn0439-8114.2020.23.031

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Using crop straw as raw materials,biochemical fulvic acid can be produced by fermentation method,and the fermentation process was optimized to provide theoretical basis for the utilization of straw with high added value.The results showed that the yield of biochemical fulvic acid was higher when the mass ratio of wheat straw to peanut straw was 2∶1.The content of biochemical fulvic acid could reach 95.10 g/kg after fermentation at 35 ℃ for 216 h.The addition of urea and fermentation bacteria were beneficial to the increase of fulvic acid yield,but the effect was not obvious when urea was added more than 2% and fermentation bacteria was added more than 3%.Wheat straw and peanut straw were mixed according to the mass ratio of 2∶1,adding 2% urea and 3% bacterial agent at 35 ℃,and fermentation for 216 h had better preparation effect of biochemical fulvic acid.

Detection Analysis

Evaluation of uncertainty in determination of acesulfame in pastry by UPLC-MS/MS

MO Li-yan, TANG Ming-hua

2020, 59(23):  143-147.  doi:10.14088/j.cnki.issn0439-8114.2020.23.032

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Analyze the whole process of determination of acesulfame in cakes by UPLC-MS/MS method,confirm the source and size of uncertainty,synthesize the uncertainty,calculate the expanded uncertainty and report the results.The content of acesulfame was 0.940 9 mg/kg,and its expanded uncertainty was 0.39 mg/kg.Through the analysis of the source of uncertainty and the quantitative evaluation of each component,the preparation process of the standard working solution is the main source of uncertainty.

Establishment of rapid identification system for inferior oil

LIU Ying-sha, HE Xin-quan, WANG Sheng-wu, LU Yao, XU Yan-yan

2020, 59(23):  148-151.  doi:10.14088/j.cnki.issn0439-8114.2020.23.033

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In this experiment,11 kinds of oil samples from different sources were tested and analyzed in 9 ways,including sensory evaluation,water content,acid value,peroxide value and plant oil mixed with animal oil,mineral oil,hemp oil,tung oil and aflatoxin.A rapid identification system for inferior oil (gutter oil) was established and suggestions were provided to consumers.

Information Engineering

A multi-food image recognition system based on candidate region

SHEN Feng-xian

2020, 59(23):  152-155.  doi:10.14088/j.cnki.issn0439-8114.2020.23.034

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This paper proposes a method for recognizing multi-food images by detecting foods in candidate regions and classifying them according to different characteristics.The candidate areas are detected by fusing the output results of multiple area detectors to combine the image feature MKL of each category to estimate the optimal weight.The food recognition method based on feature fusion was applied to the bounding box of candidate regions with various visual features,and through experiments,arranged in descending order of score to estimate images of multiple candidate foods.The results show that for a variety of food image data sets,a classification rate of 55.8% is achieved.The research results have certain reference significance for the field of similar food identification.

Biological Engineering

Study on tissue culture and rapid propagation of Zingiber officinale Roscoe cv. Fengtoujiang

YE Xing-zhi, CHENG Qun, ZHANG Deng-hong, XU Yi, CHEN Qiao-ling, CHEN Huo-yun

2020, 59(23):  156-158.  doi:10.14088/j.cnki.issn0439-8114.2020.23.035

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To screen out the optimal culture medium and build the virus-free rapid propagation system for Fengtoujiang,experiment was carried out with tissue culture technology,using stem apex of as explant and different phytohormone combination.The results indicated that the optimal effect on survival of the callus and stem apex was the combination of MS+6-BA(1.5 mg/L)+NAA(0.1 mg/L).The formation of callus was induced by the medium of MS+6-BA(2.0 mg/L)+KT(0.1 mg/L)and the robust adventitious bud was increased as well.Not only had the MS+6-BA(1.0 mg/L)+NAA(0.3 mg/L) the most efficient effect on ginger root differentiation,but also improved tillering and stand establishment,which increased the propagation significantly.

The expression of exogenous genes in mammalian cells by using baculovirus

ZOU Gui-lian, LUO Qing-ping, SHAO Hua-bin, WEN Guo-yuan, YANG Ye, SHANG Yu

2020, 59(23):  159-163.  doi:10.14088/j.cnki.issn0439-8114.2020.23.036

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Baculovirus is a kind of virus that infects invertebrates,and they are widely used in scientific research and biomedicine as expression vector and gene transduction vector.Based on “Bac-to-Bac”operating system of baculovirus,we transformed baculovirus vector into a transduction vector with capable of expressing exogenous genes in mammalian cells in this study.First,the PH and p10 promoters of pFastBac-Dual plasmids in the Bac-to-Bac operating system were replaced with the CMV promoter and EF1 promoter.Then,the egfp gene and mCherry gene were inserted into the downstream of EF1 promoter and CMV promoter respectively.The transposition was performed to obtain the recombinant baculovirus genomeexpressing egfp and mCherry genes,and recombinant baculovirus was obtained by transfect the genome to Sf9 cells.The recombinant baculovirus can generate green and red fluorescence in insect cells and mammalian cells,indicating that the recombinant baculovirus constructed with CMV promoter and EF1 promoter can express exogenous genes in insect cells as well as mammalian cells through transduction.This vector can be used for eukaryotic expression of special proteins and research and development of gene therapy drugs.

Establishment of tissue culture and rapid propagation technology system of Angelica keiskei Koidzumi

YANG Li-ping, SHI Qun, CHEN Li-wen, YANG Qiong, LI Fang-fei, CHENG Su

2020, 59(23):  164-168.  doi:10.14088/j.cnki.issn0439-8114.2020.23.037

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Taking the Angelica keiskei Koidzumi as test materials,through setting up different treatments,the optimal treatment methods and medium formulations of explants disinfection,axillary bud induction,proliferation culture,rooting culture and seedling transplanting were studied,and the tissue culture and rapid propagation technology system of the plant was established.The results showed that using 0.1% HgCl₂ disinfection for 10 min can achieved the ideal disinfection effect,the contamination rate was controlled at 13.3%,the germination rate was up to 83.3%,and the effective buds were up to 96.0%.The optimal culture medium for bud induction wasMS+0.80 mg/L 6-BA+0.10 mg/L NAA,and the buds began to germinate in about 4~6 days.The most suitable culture medium for subculture was MS+0.80 mg/L 6-BA+0.10 mg/L NAA+0.20 mg/L AD,and the coefficient of proliferation was 3.39.The rooting effect of single use of IBA or NAA is better than the combination of the two.When NAA concentration is 0.40 mg/L,the rooting rate reached 100% when cultured for 10 days,and the rooting number and average root length are better than other treatment combinations.The yellow-soil was selected as the transplanting substrate,and the seedlings with complete root system were transplanted.The survival rate was over 98% after 20 days.

Identification of different transcripts of porcine MMP14 in PAM cells and thier bioinformatics analysis

WU Jun-jing, WAN Xu-ling, HUANG Cang-yu, QIAO Mu, WU Hua-yu, MEI Shu-qi, PENG Xian-wen

2020, 59(23):  169-173.  doi:10.14088/j.cnki.issn0439-8114.2020.23.038

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Matrix metalloproteinases 14 (MMP14) is the first discovered membrane-type matrix metalloproteinases in the matrix metalloproteinases super family.MMP14 protein can hydrolyze various extracellular matrix components and serum proteins,promote extracellular matrix degradation,and hydrolyze cytokines,chemokines and growth factors.In this study,two different porcine MMP14 transcripts were found in pig alveolar macrophages (PAM).The expression levels of different transcripts of MMP14 gene in porcine PAM cells infected with PRRSV were detected by fluorescence quantitative PCR,the results showed that the expression level of transcript NM_214239.2 significantly reduced (P<0.05),while XM_021098303.1 significantly incresed (P<0.01) in PRRSV infected PAMs.Bioinformatics analysis results showed that these two different transcripts encoded two different proteins.Compared with NM_214239.2 encoded protein,the RRKR motif and PG_binding_1 functional region were missing in XM_021098303.1 encoded protein,which might not havefunctionalactivity in the inactivation of MMP14 protein.It is speculated that the inactivation of MMP14 after PRRSV infection maybe relate to the high expression of cytokines and chemokines stimulated by PRRSV.However,the specific role of MMP14 in PRRSV infection still needs further study.

Analysis of tillering characteristics, related-nitrogen assimilation enzyme activity and gene expression in rice

AN Qi, JI Wen-jun, HE Yong-gang, ZHANG Zhi-hong

2020, 59(23):  174-179.  doi:10.14088/j.cnki.issn0439-8114.2020.23.039

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Tillering of rice is one of the important agronomic traits that affect the number of panicles and thus the yield of rice.It was found that low-node (early-onset) tillers had higher yield per panicle than high-node (late-onset) tillers.12 rice varieties with different tillering characteristics were used as meterials.Based on the observation of tiller development dynamics under hydroponics conditions,ammonium nitrogen assimilation enzyme activity and rice tillering-related gene expression were analyzed.Correlation analysis found that the number of tillers was significantly positively correlated with the tillering rate in the second and third leaf positions,but no significant correlation between tiller number and tiller rate at the frist leaf position in rice.The tillering rate at the first leaf position was mainly affected by the ammonium assimilation enzyme activity in rice seedlings,while the expression of genes related to the auxin and monopetalactone signaling pathway did not significantly affect it.The second and third leaf tillering rate were relatively weakly affected by the seedling ammonium nitrogen assimilation enzyme activity and gene expression,but was mainly negatively regulated by the expression of genes related to the auxin and strigolactone signaling pathways.Besides,the soluble sugar content of rice seedlings,genes such as MOC1 that control tiller bud formation and genes that control CK synthesis were not significantly correlated with the tillering rate in the first,second and third leaf positions,while genes such as TB1 that regulate tiller bud elongation had a more significant effect on it.

Economy & Management

Research on the emergency management ability of farmers' professional cooperative fund mutual aid emergency based on AHP-entropy fuzzy method

LIU Jing

2020, 59(23):  180-188.  doi:10.14088/j.cnki.issn0439-8114.2020.23.040

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This study defined the emergency of mutual fund of farmers' professional cooperative,built an index system of 7 first-level indexes and 27 second-level indexes,which took the emergency management ability of the emergency of mutual fund of farmers' professional cooperative as the object of evaluation.AHP and entropymethod were used to determine the weight of each index,and a multi-level fuzzy comprehensive evaluation model was established to comprehensively evaluate the respondents' ability of emergency management of mutual fund emergencies.The empirical analysis shows that the evaluation index system is scientific and effective,and has high application value,which is of great significance to prevent the occurrence of the emergency risk of the mutu al fund emergency.

Analysis on time, space and driving force of coordinated development of marine and terrestrial economies in coastal provinces and cities of China

MU Ting-wei, HUANG Ling-hai

2020, 59(23):  189-196.  doi:10.14088/j.cnki.issn0439-8114.2020.23.041

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The coordinated development of marine and terrestrial economies is of great significance to China's economic and social development.Based on the data of 11 coastal provinces andcities in China from 2006 to 2016,this study constructed an index system from the coupling of sea-land system,selected Super-SBM method to evaluate the the development of land and sea economy,and calculated the coupling coordination degree of sea and landeconomic development,and then analyzed the spatial patterns and driving force of oupling coordination degree by using spatial statistical tools.The results showed that,except Shanghai and Hainan,the promotion of marine system in other provinces and cities to land economy were higher than that of land system to marine economy.The coupling coordination degree of Tianjin,Hebei,Liaoning,Shandong and Guangxi were on the decline,while Liaoning,Zhejiang and Guangdong were in the stage of mild maladjustment.The coupling coordination degree showed negative spatial autocorrelation from 2006 to 2008 and positive spatial autocorrelation from 2009 to 2016.More than 45% of coastal provinces and cities were in the region with low coupling coordination degree.The coupling coordination degree was affected by the coupling coordination degree of neighboring provinces and cities;Economic driving,government regulation,investment driving,market driving,science and technology driving and coupling coordination had positive spillover effects,while environmental inversion and coupling coordination had negative spillover effects.

Research on land renovation in hollow village:Take Chengcheng county in Shaanxi province as an example

WANG Tong-da, ZHAO Yong-hua, HAN Lei, HUANG Xin

2020, 59(23):  197-202.  doi:10.14088/j.cnki.issn0439-8114.2020.23.042

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In order to save land resources,promote the dynamic balance of total arable land and sustainable land use,it is very important to carry out the rectification work of the abandoned residential land in the hollow village.Through the research on the hollow village of Chengcheng county,Shaanxi province,the following conclusions were drawn①The main reason for the formation of the hollow village in Chengcheng county was that farmers spontaneously improve housing conditions and large-scale mining of coal resources lead to changes in topography.②The evolution process of hollow village in Chengcheng county was a process from partial hollowing to complete hollowing.③From the perspective of legal system,cultural concept and technical means,the rectification measures of hollow village were clarified.Through the evaluation of the cultivating property,it was detersmined that the hollow village of Chengcheng county should adopt the technology of remediation and rejuvenation,soil rebuilding and fertility enhancement.A comprehensive approach to remediation.④New hollow village planning link,it will be divided into service-oriented towns and development-type towns according to the situation of each township,plan different development routes,actively build the central towns,and realize the development concept of the towns and towns driving the surrounding towns.

Ecological security assessment in Hubei province based on P-S-R model

YE Sai, JIAN Xue-ying

2020, 59(23):  203-207.  doi:10.14088/j.cnki.issn0439-8114.2020.23.043

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In order to effectively assess the ecological security status of Hubei province from 2014 to 2018,10 major cities in Hubei province were selected as the research objects for empirical study.Combined with the ecological characteristics of the urban agglomeration in the middle reaches of the Yangtze River,based on the pressure-state-response model,13 indicators including the natural population growth rate,the comprehensive utilization rate of solid waste and the proportion of the tertiary industry in the regional GDP were selected to construct the ecological security index system of Hubei province.The weight of each indicator was determined by principal component analysis.The comprehensive index method and comprehensive evaluation model were used to evaluate the ecological security status of Hubei province,and based on the evaluation results,suggestions for promoting the high- quality development of Hubei province were put forward.

Analysis on the subject mechanism of China's ecological environmental damage compensation claim

DING Chen

2020, 59(23):  208-211.  doi:10.14088/j.cnki.issn0439-8114.2020.23.044

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The determination of the claimant for ecological environmental damage is the basis of the compensation system for ecological environmental damage.Only when the claimant is clarified can the claim process be initiated,the compensation system for ecological environmental damage can be implemented,and the damaged ecological environment can be effectively repaired.At present,China's main body of compensation for ecological and environmental damage is still in the preliminary exploration stage,and there are some problems such as incomplete laws and regulations,a single scope of claim subjects,and unclear division of labor among subjects.Therefore,it is necessary to further improve China's eco-environmental damage compensation claim subject mechanism from the aspects of improving China's relevant laws and regulations,expanding the scope of claims,refining the division of labor,and clarifying the order of claims,based on the analysis of the theory of eco-environmen tal damage compensation claim right,drawing lessons from the relevant provisions of foreign countries.

Study on status quo and influencing factors of the UEBMI participation by construction industry migrants

WANG Ying, SHANG Yue

2020, 59(23):  212-215.  doi:10.14088/j.cnki.issn0439-8114.2020.23.045

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Based on the data of the China migrants dynamic survey in 2017,the Logit regression model was used to study the status quo and influencing factors of the UEBMI participation by construction industry migrants.The study found that older age,less educated,higher percentage of household registration in agriculture,lower long-term intention to live locally and lower average monthly household income,lower percentage of residence in urban communities,lower percentage of employment in public institutions or state-owned enterprises,and lower percentage of permanent employers were the significant characteristics of construction industry migrants without insurance coverage.Regression results further showed that older,male,low level of education,agriculture census register,short distance migration,inter-provincial migration,had no intention to local long-term residence,low family income,living in rural communities,did not work in the institutions or state-owned enterprises,construction workers,no stable employers town worker medical insurance coverage probability was lower.

Research on the tourism image of Xi'an city based on the analysis of network text

XIANG Jin, Suo Nan Qu Zhen Zhou Ma, ZHAO Di-xian

2020, 59(23):  216-221.  doi:10.14088/j.cnki.issn0439-8114.2020.23.046

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This study taked the microblog users as the research object,and used the research methods of content analysis,semantic network analysis and kernel density estimation to analyze Xi'an's tourism image from two aspects of evaluative tourism image and structural tourism image,and put forward relevant suggestions.The results show that Hui Ethnic Street,Bell Tower,Drum Towerand City Wall are the core tourism images of Xi'an city.Ruins are the most preferred theme of tourist images.Tourism emotion evaluation is mainly positive.Xi'an's tourism image pattern has formed three major tourism image areasHui Sstreet-Bell and Drum Tower tourism image area with tourism and food as the theme,Dayan Pagoda-Ancient City Wall-Yongxingfang tourism image area with ruins as the theme,and Terracotta Warriors-Huaqing Palace tourism image area with history and culture as the theme.Image elements show the characteristics of centralized center and scattered periphery.The image of hot spots in urban tourism is still centered on material entity image.It not only supplements the limitations of the previous research on the image of urban tourism in terms of methods,but also provides suggestions for the development of urban tourism in the internet era.

The measurement of urban green development guality in the Yangtze river economic belt and the analysis of its influencing factors

HE Yuan-jing, SU Pan-da, WEN Chao

2020, 59(23):  222-229.  doi:10.14088/j.cnki.issn0439-8114.2020.23.047

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Based on the panel data of 11 provincial capitals in the Yangtze river economic belt from 2003 to 2017,the entropy method was used to analyze the quality of green development,and Tobit panel regression model was used to analyze the factors affecting the quality of green development.The results show that the quality of green development of cities in the Yangtze river economic belt is fluctuating and rising,and the regional differences are obvious.The overall trend is gradually decreasing from the upstream cities to the downstream cities and then to the middle cities,that is,the trend of “high at both ends and low in the middle”The level of economic development,market opening,foreign investment and environmental regulation play a significant role in improving the quality of green development.However,industrial structure,scientific and technological progress and urbanization play an inhibitory role in the quality of green development.The optimization path of improving the quality of urban green development in the Yangtze river economic belt was put forward from four aspectsDocking national strategy,increasing government support,optimizing industrial structure and coordinating regional differences.

Rural Revitalization

Dicussion on the ecotourism development model of rural communities-centered

CHEN Jin

2020, 59(23):  230-232.  doi:10.14088/j.cnki.issn0439-8114.2020.23.048

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In order to realize the sustainable development of eco-tourism,it is necessary for rural communities to take the community as the main body to promote tourism.Based on the literature analysis method combinind with field investigation,this paper first analyzed the connotation of ecotourism,community ecotourism,then analyzed the cause of domestic promoting ecological tourism,and based on this,taking the rural community as the core of the ecological tourism development mode was put forward,in order to further promote the healthy and sustainable development of ecological tourism in China.

Research on the mode and path of e-commerce poverty alleviation under digital rural strategy:Taking Taihu county in Anhui province as an example

CHEN Qing-yu

2020, 59(23):  233-237.  doi:10.14088/j.cnki.issn0439-8114.2020.23.049

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In order to provide new ideas for the development of e-commerce poverty alleviation,this paper investigated and studed the current situation of e-commerce poverty alleviation in Taihu county.Through the analysis,it was found that Taihu county created and promoted “e-commerce platform+leading enterprise+base+poor households”and “e-commerce platform offline consumption”e-commerce poverty alleviation mode,and implemented the “logistics+e-commerce”synchronous operation mode.However,there were some problems in infrastructure,object awareness and ability,brand construction and promotion,and high-end e-commerce talent reserve.In view of its experience and problems,it was proposed that e-commerce poverty alleviation should consider different stages of e-commerce development.In the initial stage of e-commerce development,government guidance should be given priority.In the growth stage,characteristic resources should be brought into play.In the mature stage,innovative promotion methods should be adopted.

Network governance:A logical approach to governance of rural settlement environment from the perspective of rural revitalization

ZHU Li-juan

2020, 59(23):  238-241.  doi:10.14088/j.cnki.issn0439-8114.2020.23.050

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Since the implementation of the rural revitalization strategy,the environmental governance of rural settlements has aroused the attention of the academic community on environmental governance models.The current single government-led model,market model and peasant participation model are still difficult to solve the complex problems faced by the diverse rural environment in China,and the governance effectiveness is poor.The management of rural collective environment urgently needs to establish a network that applies the relationship between multiple governance entities and the rural environment.Based on the endogenous subject status of the village that coexists with the rural environment and the construction of the “1+n”governance model,the current rural environment governance has many contradictions in terms of information issues,institutional supply,subject status and responsibilities.Through the network model to establish environmental information service platform,the use of endogenous governance subject value guidance,multi-party cooperation and co-governance,and area responsibility bundling and other multiple measures,will be effectively resolved to promote the healthy development of rural environmental governance.