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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