基于oryza2000模型的北京地区旱稻农田水分平衡分析

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1、AbstractInthispaper,thecropandsoilwaterbalancemodulesofORYZA2000werecalibratedandvalidated．accordingtoexperimentdata,whichwereconductedinBeijingfrom2003and2005。Andthentheanalysisaboutsoilwaterbalancecomponentsofaerobicricewasexecuted．BesidesWealsoexploredthee

2、ffectofgroundwatertableandsoiltextureonsoilwaterbalancecomponentsbytheuseofmodifiedmodel．ORYZA2000lowlanddeesimulationmodeIWaScalibratedbasedontheresultsofexperimentsin2004．AndthenthevalidationofmodelWaSexecutedintermsofthedynamicbiomass，yieldandsoilwatertens

3、ionbasedonresultin2003and2005．WefoundthattheoverallperformanceofmodifiedmodelwitlIrespecttobiom麟isgoodandthesimulationofyieldrankssecond。But,theevaluationofLAlisnotSOgoodasbiomassandyield；andthebiasofsoilwatertensionisliHle．Wesummarizodthecharacteristicsofsol

4、lwaterbalancein3years．Thewaterrequirementinwholegrowthseasonofaerobicricerangedfrom610mm-643mm，whichfocusedonemergencestagetoPIstage，accountingfor45％．Andanalysisaboutrelationshipbetweensoilwaterbalance，waterinputandcropgrowthwe糟made．Groundwaterplaysakeyrolein

5、thedeterminingofsoilwaterbalance．especiallyforcroptranspiration，soilpercolationandsoilwaterstorage．InChangpingsoil，theyreducewiththedecreaseofwaterinput；whereasforShangzhuangsoil，croptranspirationandsoilwaterstorage81"0notSOsignificantdifferenceasthoseinChang

6、ping,whichisaccountedforcapillaryrisewateratShangzhuangstation．Besides，Welll$detheanalysisabouttherelationshipofsoilwaterbalancecomponents．Finally,byuseofmodel，wee“xploredtheeffectofGroundWaterTable(GWT)andsoilcharacteristicsonsollwaterbalanceandrainfedyieldo

7、faerobicrice．Thesollwaterbalanceandrainfedyieldhavedifferentperformance，whenGWTkeepsaboveorunderneathlm，whichsuggestedthatlmGWTisacriticalpoint．Besides，itissoilwaterretentionabilityoftwosoilsthatbroughtaboutdifferentperformanceofsoilwaterbalanceandrainedyield

8、．ForquantilyingtheimpactofGWTandsoilcharacteristicsonsoilwaterbalanceandralnfedyield，WealsobuiltthefunctionrelationshipbetweenGWTandrelativeevapotranspirationundertwosoilconditions，whichh