湖北农业科学 ›› 2022, Vol. 61 ›› Issue (10): 28-32.doi: 10.14088/j.cnki.issn0439-8114.2022.10.005

• 资源·环境 • 上一篇    下一篇

气候变化对中国不同区域马铃薯产量差的影响

贺付伟   

  1. 商丘市气象局, 河南 商丘 476000
  • 收稿日期:2021-12-07 出版日期:2022-05-25 发布日期:2022-06-14
  • 作者简介:贺付伟(1995-),男,河南商丘人,助理工程师,硕士,主要从事气候变化与适应研究,(电话)17550527996(电子信箱)1367053465@qq.com。

Effects of climate change on potato yield gap in different regions of China

HE Fu-wei   

  1. Shangqiu Meteorological Bureau, Shangqiu 476000,Henan, China
  • Received:2021-12-07 Online:2022-05-25 Published:2022-06-14

摘要: 选取中国马铃薯主要种植区4个典型站点,利用1981—2010年气象数据和马铃薯生产资料,采用逐步订正法,分析了气候变化对中国主要种植区马铃薯生产潜力和产量差的影响。结果表明,北方一作区马铃薯光温生产潜力最高,其次是中原二作区和西南混作区较为接近,南方二作区光温生产潜力最低。北方一作区和中原二作区光温生产潜力呈不显著下降趋势,西南混作区呈显著上升趋势,南方二作区呈不显著上升趋势。北方一作区、中原二作区和西南混作区气候生产潜力(雨养产量)较为接近,南方二作区则较低,4个区域都呈显著下降趋势。马铃薯光温-气候产量差北方一作区最高,其次是中原二作区和西南混作区,最低是南方二作区。水分是北方一作区缩小产量差的主要限制因子,增加灌溉量后产量有较大的提升,其他区域的马铃薯产量也有很大提升的空间。马铃薯气候潜力-实际产量差值是北方一作区和西南混作区较为接近,其次是中原二作区,南方二作区最低。北方一作区和西南混作区尚未达到气候生产潜力的上限,在雨养农业地区除了灌溉以外,还可通过其他管理措施来提升实际产量,降低产量差。中原二作区和南方二作区出现了气候-实际产量差值低于0的情况,说明这2个区域的实际产量已达到甚至超过了气候生产潜力上限,这些地区在雨养条件下除了灌溉以外,其他管理措施对于产量的提升作用较小。

关键词: 光温生产潜力, 气候生产潜力, 马铃薯, 气候变化, 产量差

Abstract: The main four planting areas of potato in China were selected, and the effects of climate change on potato potential production and yield gap were analyzed based on meteorological data from 1981 to 2010 and potato production,by using the stepwise correction method. The results showed that the light-temperature potential production of potato was the highest in the northern single-crop zone, followed by the central double-crop zone and southwestern mix-cropping zone, which were close to each other, and the light-temperature potential production in the southern two cropping areas was the lowest. The light-temperature potential production showed no significant decreasing trend in northern single-crop zone and the central double-crop zone, showed a significant increasing trend in southwestern mix-cropping zone, and showed no significant increasing trend in the southern second cropping zone. The climatic potential production (rain-fed yield) in the northern single-crop zone, the central double-crop zone and southwestern mix-cropping zone was nearly equal, while that of the southern second cropping zone was lower, and the four regions all showed a significant downward trend. The difference of light-temperature and climatic potato yield was highest in the northern single-crop zone, followed by central double-crop zone and southwest mixed cropping zone, and lowest in southern second cropping area. Rain was the main limiting factor to reduce the yield gap in northern cropping zone, and the yield of potato in other regions also had great advancement by increasing the irrigation amount. Yield gap between climatic productivity and actual productivity in single-crop zone and southwestern mix-cropping zone were close to each other, followed by the central double-crop zone, and lowest in southern double-crop zone. The upper limit of climatic production had not been reached in northern single-crop zone and southwestern mixed cropping zone. In rain-fed agricultural zone, other managements measure could be adopted to increase the actual yield and reduce the yield gap besides irrigation. The yield gap between the climatic and actual yield in the central double-crop and the southern double-crop was lower than 0, indicating that the actual yield in these two regions had reached or even exceeded the upper limit of climatic production. In these regions, other management measures had little effect on the increase of yield under the rain-fed condition except irrigation.

Key words: light-temperature potential productivity, climatic potential productivity, potato, climate change, yield gap

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