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1、中国水稻科学(ChinJRiceSci),２０１５,２９(５):５０１－５１０http://www．ricesci．cnDOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１５．０５．００７５０１水稻灌浆期冠层温度对植株生理性状及稻米品质的影响高继平隋阳辉张文忠∗姚晨高明超赵明辉徐正进(沈阳农业大学水稻研究所/农业部东北水稻生物学与遗传育种重点实验室/北方超级粳稻育种教育部重点实验室,沈阳１１０８６６;∗通讯联系人,EＧmail:zwzhong＠１２６．com)EffectofCanopyTemperatureonPhysiologicalCharacteristicandGrain
2、QualityatFillingStageinRiceGAOJiＧping,SUIYangＧhui,ZHANGWenＧzhong∗,YAOChen,GAOMingＧchao,ZHAOMingＧhui,XUZhengＧjin(RiceResearchInstitute,ShenyangAgriculturalUniversity/KeyLaboratoryofNortheastRiceBiologyandBreeding,MinistryofAgriculture/KeyLaboratoryofNorthernjaponicaSuperRiceBreeding,MinistryofEducati
3、on,Shenyang１１０８６６,China;∗Correspondingauthor,EＧmail:zwzhong＠１２６c．om)GAOJiping,SUIYanghui,ZHANGWenzhong,etal．Effectofcanopytemperatureonphysiologicalcharacteristicandgrainqualityatfillingstageinrice．ChinJRiceSci,２０１５,２９(５):５０１Ｇ５１０．Abstract:Afieldexperimentwasconductedtoilluminatethedailyvariationofca
4、nopytemperatureanditsrelationshipwithsoilwatercontent,physiologicalcharacteristicsandgrainqualitywithLiaojing２９４andKaijing１asmaterialsduringfillingstageatfivegradientsoilwatercontents．Theresultsshowedthat:１)Thecanopytemperature,lowerthanairtemperature,wassignificantlypositivelycorrelatedwithairtempe
5、rature．ThegradientsoilwaterstressledtoagradualincreaseinthecanopytemperatureandcanopyＧairtemperaturedifference．Thatistosay,thecanopytemperatureandtheabsolutevalueofthecanopyＧairtemperaturedifferenceincreasedasthesoilwaterpotentialdeclined．２)Underthesameconditions,thecanopytemperatureofdroughtsuscept
6、ivevarietyLiaojing２９４waslowerthanthatofthedroughtresistantvarietyKaijing１．３)ThecanopyＧairtemperaturedifferencewassignificantlynegativelycorrelatedwithfilledgrainnumberperpanicle,１０００Ｇgrainweight,seedＧsettingrate,grainyield,percentageofheadrice,proteincontent,amylasecontent,fattyacidcontentandtasteva
7、lue．Butitwassignificantlypositivelcorrelatedwithunfilledgrainnumber,chalkinessdegree,chalkinessrateandbrokenricerate．４)Asthesoilwaterpotentialdecreased,thephotosyntheticrate,stomatalconductanceandtran
