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1、中国科技论文在线http://www.paper.edu.cnEffectofmaize-soybeanintercroppingandnitrogenrateson#cropnitrogenandcarbonuptakeinuplandredsoil11112*5YANGWenting,MIAOJianqun,WANGXiaowei,XUJiancheng,LUMeijuan(1.SchoolofAgriculturalSciences,JiangxiAgriculturalUniversity,Nanchang,330045;2.CollegeofTerritorialResou
2、rcesandEnvironment,JiangxiAgriculturalUniversity,Nanchang,330045)Abstract:Theobjectiveofthisresearchwastodeterminetheeffectofcroppingpatterns(monomaize,10monosoybeanandmaize-soybeanintercropping)andnitrogenrates(0,75,150,225,300kg/ha)oncropbiomass,nitrogenandcarbonaccumulationinuplandredsoil.Th
3、eresultsshowthat:Comparedwithsolemaize,maizedrymatteryieldandcarbonaccumulationdecreasedwheninintercroppedsoybean.Also,theinteractionbetweenintercroppingandnitrogenrateschangednitrogenaccumulationanddistributionincropgrain,strawandroot.Nitrogenapplicationsignificantlyincreasedmaizedry15matteryi
4、eld,nitrogenandcarbonaccumulation,butreducedthoseofsoybean.Inaconclusion,corn-soybeanintercroppingandnitrogenratesaffectedthegrowthofcornandsoybeaninuplandredsoil,andchangedtheallocationsofnitrogenandcarbon.Maize-soybeanintercroppingshouldbeaneffectiveandsustainablecroppingsystemforuplandredsoi
5、l.Keywords:Agroecology;Nitrogenaccumulation;Carbonaccumulation;Redsoil200IntroductionIntercroppingasatraditionalcroppingsystem,ithasbeenusedformillenniabysmallholderfarmersinAsia,AfricaandLatinAmericatoincreaseyieldsandexploitspeciescomplementarities7(Vandermeer1989;Zomeretal.,2009).InChina,mor
6、ethan2.8×10haaresownwithintercropping25annually(Zou2002),especiallyinnorthwestChina(Lietal.,2001).IntercroppingalsoisusedinEuropeanorganiccroppingsystems(Hauggaard-Nielsenetal.,2009).Ithasshownagiantpotentialtocontributetomodernandsustainableagriculture(Lithourgidisetal.,2011;Malikietal.,2016).
7、Manyadvantagesofintercroppinghavebeenreported,especiallycereal-legumeintercroppingsystem[8,9](Lietal.,2007a;Betencourtetal.,2012).Themostimportantadvantagemaybeit30significantlyimprovescropyieldcomparedwithsolecropping(Lietal.,200
