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ImpactofclimatechangeonwateruseofwinterwheatwithHadCM3Model
CONGZhen-tao,XINRu,YAOBen-zhi,LEIZhi-dong(TsinghuaUniversity,Beijing100084,China)
Abstract:Climatechangeaffectscropgrowththatresultsinvariationincropwateruseandconsequentlyirrigationrequirement.ThispaperinvestigatedtheimpactofthepredictedclimatewithHadCM3modelus ingtheIPCCscenariosofCOMMIT,SRA1B,SRA2andSRB1onwinterwheatgrowthandwaterusenearBeijingunderdifferentirrigationtreatments.GrowthofwinterwheatissimulatedusingCERESmodel.Theconclusionincludes(1)theairtemperaturewillincreaseandtheradiationwilldecreaseduringthegrowthseason;(2)thegrowthdurationwillbeshortenedanditcorrelatesnegativelywithairtemperature;(3)un dersufficientornoirrigationcondition,yieldandtheevapotranspirationwilldecreaseunderdifferentscenar ios;(4)irrigationdemandwillreduceby8.4%undersufficientirrigation;(5)wheatyieldcorrelatespositive lywithevapotranspiration.Keywords:climatechange;wateruse;winterwheat;HadCM3;CERES
(责任编辑:吕斌秀)
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