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1、中国水稻科学(ChinJRiceSci),２０１４,２８(５):５２３－５３３http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１４．０５．０１０５２３氮肥和孕穗后期高温对两个早稻品种产量和生理特性的影响杨军陈小荣朱昌兰彭小松贺晓鹏傅军如欧阳林娟边建民胡丽芳贺浩华∗(江西农业大学农学院/作物生理生态与遗传育种教育部重点实验室,南昌３３００４５;∗通讯联系人,EＧmail:hhhua６４＠１６３．com)EffectsofNitrogenLevelandHighTemperatureatLateBootingStageonYi
2、eldandPhysiologicalCharacteristicsofTwoEarlyRiceCultivarsYANGJun,CHENXiaoＧrong,ZHUChangＧlan,PENGXiaoＧsong,HEXiaoＧpeng,FUJunＧru,OUYANGLinＧjuan,BIANJianＧmin,HULiＧfang,HEHaoＧhua∗(KeyLaboratoryofCropPhysiology,EcologyandGeneticBreeding,MinistryofEducation/CollegeofAgronomy,JiangxiAgriculturalUni
3、versity,Nanchang３３００４５,China;∗Correspondingauthor,EＧmail:hhhua６４＠１６３c．om)YANGJun,CHENXiaorong,ZHUChanglan,etal．Effectsofnitrogenlevelandhightemperatureatlatebootingstageonyieldandphysiologicalcharacteristicsoftwoearlyricecultivars．ChinJRiceSci,２０１４,２８(５):５２３Ｇ５３３．Abstract:Thecompoundeffectsof
4、nitrogenlevelandhightemperatureatlatebootingstageonriceyieldwereinvestigatedattwonitrogenlevels,withhybridricecombination(Ganxin２０３)andconventionalricecultivar(Zhong５３１)asmaterialsat３８°Cfor４daysatlatebootingstage．Weanalyzedthedifferenceingrainyieldandphysiologicalindicatorsofthetworicecultiv
5、arsandnitrogeneffectsunderhightemperature．Theresultsshowedthatyieldperplant,effectivepaniclenumberperplant,spikeletnumberperpanicle,spikeletsfertility,differentiatedspikeletnumberperpanicle,andharvestindexofthetworicecultivarsdecreasedtovariousdegreesunderhightemperatureatthesamenitrogenleve
6、latlatebootingstage．Furthermore,hightemperaturesignificantlydecreasedyieldperplant,spikeletfertility,andharvestindexcomparedwithnaturaltemperature(P＜０．０５)．Theratioofdegeneratedspikelets,leafweightperstem,stemandsheathweightperstemincreasedunderhightemperature,whileunderhightemperaturetherati
7、oofdegeneratedspikeletssignificantlyincreasedcomparedwithnaturaltemperature(P＜０．０５)．Atthesamenitrogenlevel,thechlorophyllcontentsofthetwocultivarsincreasedtovariousdegreesatthelatestageunderhightemperature．ForZhong５３１,thechlorophyllcontentsincrease
