资源描述：
《根际氧浓度对水稻产量及其氮素利用的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、中国水稻科学(ChinJRiceSci),２０１５,２９(４):３８２－３８９http://www．ricesci．cn３８２DOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０４．００７根际氧浓度对水稻产量及其氮素利用的影响胡志华＃朱练峰＃林育炯胡继杰张均华金千瑜*(中国水稻研究所水稻生物学国家重点实验室,杭州３１０００６;＃共同第一作者;∗通讯联系人,EＧmail:jinqy＠mail．hz．zj．cn)EffectsofRhizosphereOxygenConcentrationonRiceGrainYieldandNitr
2、ogenUtilizationHUZhiＧhua＃,ZHULianＧfeng＃,LINYuＧjiong,HUJiＧjie,ZHANGJunＧhua,JINQianＧyu∗(StateKeyLaboratoryofRiceBiology,ChinaNationalRiceResearchInstitute,Hangzhou３１０００６;＃Theseauthorscontributedequallytothiswork;∗Correspondingauthor,EＧmail:jinqy＠mail．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
