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《Geographical Research》 2012-08
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Variation of climate suitability of winter wheat in Central Plains under the condition of climate warming

ZHU Xin-yu1,LIU Jie2,SHI Ben-lin1,ZHANG Yi3(1.College of Environment and Plaining,Shangqiu Normal University,Shangqiu 476000,Henan,China; 2.Department of Resources and Environment,Heze University,Heze 274000,Shandong,China; 3.Shangqiu Weather Bureau,Shangqiu 476000,Henan,China)  
Global climate change has significant impacts on agricultural production.Climate variability adversely impacts crop production and imposes a key constraint on agricultural production,mostly on how to enhance the yields of winter wheat,across the world.Owing to the fundamental importance of food to human welfare,crop and livestock production,we used the data of winter wheat experimental field and meteorological data of eight agrometeorological experiment stations and agrometeorological observation stations from 1991 to 2010 to establish the models of climate suitability.The variation of climate suitability in the whole growth period from 1971 to 2010 was analyzed.The results showed that the suitability degrees of temperature,sunshine,precipitation and integrated index were 0.54,0.64,0.37 and 0.50 respectively during the whole growth period of winter wheat.The sunshine suitability degree was the best,temperature suitability degree took the second place and the precipitation suitability degree was the worst.It is indicated that precipitation is the major limiting factor affecting winter wheat growth and development.It was shown that the temperature and precipitation suitability degrees decreased by 0.001 every year and sunshine suitability degree decreased by 0.002 every year from 1971 to 2010.The weaken combination effects of temperature,sunshine and precipitation were unfavorable for the growth of winter wheat.The temperature,sunshine and precipitation suitability degrees were weaker and these factors had poor combination effects in sowing to emergence period from 1971 to 2010.The precipitation suitability degree was good,sunshine and temperature suitability degrees were weaker in emergence to jointing period of winter wheat.In jointing to milk period of winter wheat,temperature and sunshine suitability degrees were good,and precipitation suitability degree was weak;and the combination of climate factors tended to be better.The sunshine and precipitation suitability degrees were good,temperature suitability degree was weaker in milk to maturity period of winter wheat;and the integrated climate suitability degree began to deteriorate.Per unit yield of winter wheat had a significant correlation with sunshine,temperature and precipitation suitability degrees in the middle-late growth period of winter wheat.
【Fund】: 国家自然科学基金项目(41140019);; 河南省教育厅科技攻关项目(12A170005)
【CateGory Index】: S512.1;S162
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