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《Agricultural Research in the Arid Areas》 2006-04
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Impact of climate warming on yield of summer and autumn crops in Gansu province

LIU De-xiang~(1),GUO Jun-qin~1,DONG An-xiang~2,NING Hui-fang~3 (1.Lanzhou Regional Climate Center,Lanzhou,Gansu 730020,China;2.Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Lanzhou Institute of Arid Meteorology,CMA,Lanzhou,Gansu 730020,China;3.Meteorological Information Center of Gansu Province,Lanzhou,Gansu 730020,China)  
By comparative analysis between the accumulated temperature above 0℃ and the yield of winter wheat and spring wheat,and between the accumulated temperature above 10℃ and the yield of corn,it has been shown that there are positive correlations between the accumulated temperature above 0℃ or 10℃ and the yields of winter wheat,spring wheat and corn in both dry farmlands and irrigation farmlands at 95% and 99% significant level,respectively.There is also a positive correlation between the autumn and spring precipitation and the yield of winter wheat in dry farmlands at 90% significant level.The climate warming causes the increase of thermal resource during the growing period of crops,and is propitious to the rise of yield.However,because of the reducing of precipitation,the effect of thermal resource increasing is limited,and the negative influence of climate warming on yield of crops has been displayed in Hedong region.
【Fund】: 甘肃省科技攻关计划项目“甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究”(2GS042—A44—017)
【CateGory Index】: S162
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