資源描述：
《根際氧濃度對水稻產(chǎn)量及其氮素利用的影響》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、中國水稻科學(xué)(ChinJRiceSci),２０１５,２９(４):３８２－３８９http://www．ricesci．cn３８２DOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０４．００７根際氧濃度對水稻產(chǎn)量及其氮素利用的影響胡志華＃朱練峰＃林育炯胡繼杰張均華金千瑜*(中國水稻研究所水稻生物學(xué)國家重點實驗室,杭州３１０００６;＃共同第一作者;?通訊聯(lián)系人,EＧmail:jinqy＠m(xù)ail．hz．zj．cn)EffectsofRhizosphereOxygenConcentrationonRiceGrainYieldandNitr
2、ogenUtilizationHUZhiＧhua＃,ZHULianＧfeng＃,LINYuＧjiong,HUJiＧjie,ZHANGJunＧhua,JINQianＧyu?(StateKeyLaboratoryofRiceBiology,ChinaNationalRiceResearchInstitute,Hangzhou３１０００６;＃Theseauthorscontributedequallytothiswork;?Correspondingauthor,EＧmail:jinqy＠m(xù)ail．hz．zjc．n)HUZhihua,ZHULianfen
3、g,LINYujiong,etal．Effectsofrhizosphereoxygenconcentrationonricegrainyieldandnitrogenutilization．ChinJRiceSci,２０１５,２９(４):３８２Ｇ３８９．Abstract:HydroponicexperimentswereconductedtorevealtheeffectofrhizosphereoxygenconcentrationonricegrainyieldandnitrogenabsorptionandutilizationwithIR
4、４５７６５Ｇ３B(deepwaterrice),Zhongzheyou１(lowlandrice)andZhonghan２２１(uplandrice)asmaterialatfourrhizosphereoxygenconcentrationlevels,１．０mg/L(T１,hypoxia),３．０mg/L(T２),５．５mg/L(T３)and７．５mg/L(T４,saturatedoxygenconcentration)．Theresultsshowedthatundervariousrhizosphereoxygenconcertration
5、sthegrainyieldanddrymatteraccumulationsignificantlydifferedamongcultivars,andfollowedatrendofT２＞T１＞T３＞T４．ForIR４５７６５Ｇ３BandZhonghan２２１,theimpactongrainyieldwasmainlyduetograinnumberperpanicleandseedＧsettingrate．ForZhongzheyou１,itwasduetotheabovetwofactorsandeffectivepaniclenumbe
6、r．Incaseofnitrogenaccumulationandutilization,thenitrogenabsorptionunderT１andT２wasenhancedduringearlygrowthstage．AerationcouldincreaseNaccumulationduringlategrainfillingstage,buthinderNtransferringtograinunderexcessiveoxygenconcentration．Inaddition,nitrogenutilizationefficiency
7、(NUE)inT２wasthehighest,６．９％,１２．８％,１３．８％higherthanthoseinT１,meanwhileNdrymatterproductionefficiencywasenhancedduetorhizosphereaerationduringvegetativegrowthstage．Inall,rhizosphereoxygenconcentrationof３．０mg/LeffectivelyenhancegrainyieldandNabsorptionandutilizationofthreericegeno
8、types．Keywords:rice;rhizosphereoxygenconcentration;grainyield
