Temporal and Spatial Distribution of Early Season Rice Heat Damage in Liuzhou City

doi:10.14088/j.cnki.issn0439-8114.2018.20.015

Abstract

Abstract: The analysis of regularity of heat damage in Liuzhou and its relationship with the fluctuation of rice yield could provide a scientific reference for rational arrangement of rice production and the defense of heat damage. Meteorological data of 8 meteorological stations from 1960 to 2014 were collected to analyze the temporal and spatial distribution of the occurrence frequency of heat damage. Meanwhile, with the statistical yield data of early rice in Liucheng county and Luzhai county from 2003 to 2016, the effects of heat damage on the yield of early rice were analyzed. The results showed that the annual occurrence of heat damage was mainly divided into two periods, namely 1960-1980 and 1981-2009. In the two periods, heat damage showed a first decreasing and then increasing trend. The frequency of light, medium, heavy and total heat damage mainly existed a period of 1~4 year scale which occur in 1980. Heat damage presented much severer in the south of study area than in the north. The total frequency and intensity were not significant. But there was a significant impact on the early rice yield in the south of Liuzhou in 2010.

Key words: heat damage, annual change, wavelet analysis, yield

CLC Number:

S512.1

TANG Guo-min, LIU Yong-yu, HUANG Wei, WU Xuan-ke, AN Jia-jun, CHENG Qian-qian. Temporal and Spatial Distribution of Early Season Rice Heat Damage in Liuzhou City[J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(20): 69-75.

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