利用土壤信息系统进行水稻施氮量决策初探3

31121(1,210095;2,214214),,,,;;;S5111062Apreliminarystudyonricenitrogenapplicationdecision-makingbysoilinformationsystemAcasestudyofDafengCity,JiangsuProvincePanJianjun1,FangShibo1,SunWeixia2,ChenLiyan1(1CollegeofResourceandEnvironmentalSciences,NanjingAgricUniv,Nanjing210095;2Eco2agriculturalCo,LtdPengyaoGroup,Yixing,Jiangsu214214)ABSTRACTTheframeworkandcontentofriceNfertilizerapplicationdecision2makingbasedonmethodoffertilizationfortargetyieldbymeansofsoilinformationsystemwereintroducedandtheresultsofapreliminarystudyofDafengCity,JiangsuProvincewereshowed.Keywordssoilinformationsystem;riceNfertilizerapplicationdecision2making;methodoffertilizationfortargetyield;DafengCityJiangsuProvince,,,,,,,,,,[1]1,[2],,,:=(-)/()2,1,,,,3(49771043)(BK97100):1999O11O012000,23(3):5356JournalofNanjingAgriculturalUniversity©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)(3),(10%),,,:Y=[Y1+Y2++Yn)/n](1+c1C):Y;Y1,Y2,,Yn;n;c;C,1,2,3,(2)Y(W)(3)(Np)Np=YN1+WN2:Np();YW;N1N2(4)Nsoil=AN100000K:Nsoil(kg);AN()(mg/kg);K,2250000kg/hm2(5)NpNsoil()N=Np-Nsoil(6),,pHCEC,(7),,(8)2(,kg/hm2)30165kg/hm2,105kg/hm24(1),,;,,(2),;,,,,,,,(3),,,;pHCEC(4),,4523©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(5),5,,,(),,,,,,,,()1,,11,1999,22(3):45482,11,1995,32(3):241251()2001,,,19971998;1999,,200116,120,,15,90:CN11O1328/S,:2O138,:BM43:0256:10008130;:(010)68919808689762446523©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.