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DUJun,SUNKe-gang,ZHANGYun-hong,etal.EffectsofControlledReleaseUreaonPhysiologicalCharacteristicsandNitrogenUseEfficiencyof RiceandNO-3-NContentsinSoil

2016 JournalofAgriculturalResourcesandEnvironment   unpublished

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Abstract: Fieldexperimentswereconductedtostudytheeffectsofcontrolledreleaseurea(CRU) onkeyenzymesactivitiesofnitrogen metabolismofrice,nitrogenuseefficiencyandsoilNO -3 -Ncontents,inordertoverifythemechanismofCRUonincreasingnitrogenuse efficiencyandincreasingsoilNO -3 -Naccumulation.TheresultsshowedthatCRUcouldimprovesignificantlynitratereductase (NR)activities ofriceleavesinfullheadingstageandmilkstage,especiallyinmilkstage.Theactivitiesofglutaminesynthetaseandglutaminetransversase
more » ... wereobviouslyincreased,andtheenhancementcontinuedtilldoughgrainstage,especiallyinfullheadingstage.Meanwhile, CRUwasabletopromotesignificantlyproteaseactivityofriceleavesinmilkstageanddoughgrainstage.Thetreatmentof4 ( CRU60%+ PU40%) wasthebesttreatmentofthekeyenzymesactivitiesofnitrogenmetabolism.CRUalsohadbettereffectonpromotingglutamine synthetaseandglutaminetransversaseactivitiesofbrownrice,andincreasedsignificantlyriceyieldandnitrogenuseefficiency,especially thetreatmentof4.CRUenhancedsignificantlyproteincontentsinbrownrice,thereforewhichimprovedqualityofricetosomeextent. Moreover,CRUcouldreduceNO -3 -Naccumulationinsoilprofilesignificantly.CRUapplicationcouldevidentlydecreasethequantityofsoil NO -3 -Nleachedtodeepsoilandlessentherisktogroundwaterpollution. Keywords: controlledreleaseurea; rice; physiologicalcharacteristics; nitrogenuseefficiency; soilNO -3 -N 农业资源与环境学报 2016 年 3 月·第 33 卷·第 2 期 :134-141 March2016·Vol.33·No.2: 134-141
fatcat:u67omxpbp5fqjivhr26rlbk72i
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"DUJun,SUNKe-gang,ZHANGYun-hong,etal.EffectsofControlledReleaseUreaonPhysiologicalCharacteristicsandNitrogenUseEfficiencyof RiceandNO-3-NContentsinSoil." JournalofAgriculturalResourcesandEnvironment (2016)