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1、!"#$%&(ChineseJournalofAgrometeorology)2010,31(4):551-557doi:10.3969/j.issn.1000-6362.2010.04.012ú?üyt.c?!"Dn%#$%&1,2,1,211,21,21,2TUVWX(,YZ[,]^,_`,abc(1B?j¥|ò/01,á410125;2B?j#$5D/0!,á410125)45:/0dZ2?ò{+h§?o4íy,e4¤dv+?ò、Y¨35D?:Yh?<。/0P?¨=fvo?è£,eB?dZ2、§?P{ho4ía?y/0。f?7?
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3、J?、§?P{!cm??。P"#$d§?P{z??ò?h§o4í{,#e*73zh?p。678:B?;、§;d;o4íNitrogenandPhosphorusLossesfromSurfaceRunoffunderDifferentApplicationintheDoubleCroppingRiceFieldsinHunan1,21,211,21,21,2SHILihong,JIXionghui,LIHongshun,TIANFaxiang,PENGHua,LIUZhaobing(1SoilandFertilizerInstitut
4、eofHunanProvince,Changsha410125,China;2ResearchCenterofAgroEnvironmentofHunanProvince,Changsha410125)Abstract:Itwassignificanttostudythenitrogenandphosphoruslossesfromsurfacerunoffindoublecroppingricefiledforguidingtherationalfertilizerandprotectingwaterenvironment.Thesurfa
5、cerunofflossesunderdifferentnitrogenandphosphorusapplicationindoublecroppingricefieldinHunanwasstudiedbasedonfieldexperimentdatacombiningwithrunoffplot.Theresultsshowedthatbothnitrogenandphosphorusconcentrationsincreasedwithapplicationincreasinginsinglerunoff.Ammoniumnitrog
6、enandsaltpetrenitrogenwerethepredominantformsofnitrogensurfacerunoff.Ammoniumnitrogenwasdominantinprophaseofdoublericegrowthseasonandsaltpetrenitrogeninanaphase.Theratiosofdissolublephosphorustototalphosphorusofrunoffwaterwere110%~940%.Nitrogenandphosphorus-1-1lossesfromsur
7、facerunoffundertheirdifferentapplicationwere3710~7290kg·haand0200~0320kg·ha,anderosioncoefficientswere1870%~3771%and0327%~0966%.Therewasgoodlinearcorrelationbetweennitrogenandphosphoruslossesfromsurfacerunoffandtheirapplication.Theircoefficientswere0978and0997.Redu
8、cingnitrogenandphosphorusapplicationindoublecroppingricefiledappropr