25934.間作對(duì)氮素和水分利用的影響

1、中國農(nóng)業(yè)大學(xué)博士學(xué)位論文間作對(duì)氮素和水分利用的影響姓名：葉優(yōu)良申請學(xué)位級(jí)別：博士專業(yè)：植物營養(yǎng)學(xué)指導(dǎo)教師：張福鎖李隆20030601AbstractIntercropping，duetothemoreeffectiveuseofresourcesandhighproductivityispracticedwidelyinnorthwesternChinaInrecentyears，nitrogenapplicationrateisinc

2、reasingcontinualtNandirrigatedwaterinputisalselativelygreatHowevertheresearchonnitrogenandwaterUseefficiencyareveryfewOurworkreportedhereareaimingatimprovingnitrogenandwateruseefficiencyinwheal／maize，fababean／maize，pea／m

3、aizeandsoybean／maizeintereroppingthroughfieldexperimentThemainresultsobtainedwereasthefollowing：(1)Landequivalentratio(LER)wasgreaterthanI0forfababean(giciafabaL)／maize(2eamarsL)intercroppingregardlessofnitrogenfertilize

4、rapplicationornotBaSedongrainyieldsproduction，LERofpea(2isumsativumL)／maizeintercroppingWasover1Oinspiteofnitrogenfertilizerapplication，whileLERwashigherthan10onlywhennitrogenfertilizerWaSappliedbasedonbiomassproductionH

5、oweverLERinsoybean(Olycinew“L。)／maizeintereroppingWaSsmallerthan10bothnitrogenapplicationaandnonitrogenapplicationInwheat(TriticumaestivumL)／maizeintercroppingLERwasgreaterthan10whennitrogenfertilizerwasappliedandLERWasv

6、ariedwithwheatvarietiesandexperimentconditionswithoutnitrogenfertilizerapplication(2)NitrogenuptakebyintercroppedfababeanandmaizeWasgreaterthanthoseinsolecropping，semilartreadswereobservedinpea／maizeintercroppingNitrogen

7、uptakeofintercroppedwheatwashigherinwheat／maizeintercroppingthanthatinsolecroppedwheat，andnitrogenuptakeofintercroppedmaizewaslowerorclosetothatinsolecroppedoneIncontrast，intercropedsoybeanwaslessthanthatbysolesoybean，wh

8、ereaSnitrogenuptakebyintemropprdmaizeWaSgreaterthatthatbysolemaizeinsoybean／maizeintercropingNitrogenutilizationefficiencyinintemroppedfababean，pea，soybeanandwheatWaSgreaterthanthatincorrespondingsolecropps，howeverinterc

9、roppedmaizewaslowerthanthatinsolecroppedmaize(3)Nitrogensurplusandnitrogenlosswereless，andapparentnitrogenrecoverybyplants，nitrogenproductionrateweregenerallygreaterinintemroppedfababean，pea，soybeanandwheatthanthoseinsol

10、ecroppedfAbabean，peasoybeanandwheat，respectivelyf(4)SoilN03“NconcentrationandaccumulationwereincreasedwithincreasednitrogenapplicationN03二Naccumulationinsoilofintercroppedfababeanandpeaweregraterthanthatinsolefababeanand

11、pea，butvariedwithdifferentnitrogenapplicationandtimeinintercroppedsoybean，wheatandmaize(5)Soilwatercontentsinintereroppedfababean，peasoybeanandwheatwerehigherthanthoseincorrespondingsolecrops，andthecontentinintemroppedma

12、izeWasdecreasedcomparedwithsolemaizewhendeterminedafterfababeanharvestingAftermaizeharvest，sellwatercontentsinintercroppedmaizeweregraterthanthatinsolecroppedWateruseefficiency(wu日offahabean／maizeintercroppingrelativetos