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1、河南农业大学硕士学位论文玉米养分管理决策支持系统研究姓名：魏俊凯申请学位级别：硕士专业：作物栽培学与耕作学指导教师：郑国清;马新明20090601StudyonDecisionSupportSystemforMaizeNutrientManagementSuperV•1sedbpr0ryfessorzhengGuoqingprofe:ss0rMaXinm•1MansgterCand•1date:WeiJunkaiABSTRACTTheimp1ementationofvariablerateferti1izerapp1icatorforpreci
2、sionagriculturetechnologyisoneoftheimportantcontents,arguingthatundcrthesma11•scaleFieldbetweenthedifferencesinsoi1ferti1ityandcropgrowth,subjecttodifferentamountsofferti1izer,whichcanreducetheuseofferti1izertimprovingtheuLi1izalionofferli1izers,andfromthereducetheovera11non
3、—poinlsourcepollulion.ALbased0n0utput0rrem0tesens•ngdatabutthe1•m•tat•0ns0fthesystem()rdUet()theh•1ghPr•1CcS0raPP1•1cdL0Lhcpr0ducL•10n0fsma11•In20072009•1nwenC0untyagr•1cu1tura1bas•1s0fthetest,bu•11dam0dc10fVarab1eratefert1zat0n0ft0mandntr0gen9ph0sPh0rbsandp0tassumstresstest
4、onthe$ystcm,resu1tsshO'JVthat••present,variablerateferti1izationresearchfocusedonsoi1ferti1ityandobjectives1environmentinWenFiaccurSimulaferencIheacLiffererst1y,Basedontheecologicaunty,in.theN,P.K..fu...,Juappropriateconditions,growthstageandyieldhigheracyofsimulattionofebeI
5、weua1obsion,eofthcwholcgrowthpcriodwiththconlydif1〜2d・jointingstagcandhcadingphasedneebetweenthelrweightofthsimulatedoefficienspec1y,for3—6dand0〜4d,LAI,drymatteeandmeasuredtreachedO.9luesmatch.thecorrelationc8—0.9876；outputanalogvalueabetween5・5〜va00ndthemeasuredva1ueofthedi
6、fference50.6kg/acre・However,nilrogenstressconditions,simu1ationsignificanterror.Second1y9Inaccordancewiththeprincipleofnutrientbalanceand^crop—soi1•environment—technologynprinciple,buildamodelofvariablerateferti1izatcom,includingcornbeforeionofsowingnitrogen,phosphorusandpot
7、assiumferti1izerandsowingthetotalaftertheamountofnitrogentopdressingaccurate.Thespatialinformationtechnologytothesoi1dataandthevolumeoftomtobefatanderminethevarietiesame.Thisredreproductivestagescombinedleaisedcropfaclor,theinitialvalueoftheferti1farca,throughthczerberevicad
8、stotherevrdertodet0ffert•11•zeraPP1•1cat•10nmethod0fthewasteandthep011ut•10
