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1、中国水稻科学(ChinJRiceSci),2017,31(4):379－390http://www.ricesci.cnDOI:10.16819/j.1001-7216.2017.7006379干湿交替灌溉对抗旱性不同水稻品种产量的影响及其生理原因分析1112111,*卞金龙蒋玉兰刘艳阳冯咏芳刘贺夏仕明刘立军12(扬州大学江苏省作物遗传生理重点实验室/农业部长江中下游作物生理生态与栽培重点开放实验室，江苏扬州225009；江苏省东台市东台镇农*业技术推广综合服务中心，江苏东台224200；通讯联系人，E-mail:ljliu@yzu.edu.cn)Eff
2、ectsofAlternateWettingandDryingIrrigationonGrainYieldinRiceCultivarswithDifferentDroughtResistanceandItsPhysiologicalMechanism1112111,*BIANJinlong,JIANGYulan,LIUYanyang,FENGYongfang,LIUHe,XIAShiming,LIULijun(1JiangsuKeyLaboratoryofCropGeneticsandPhysiology,YangzhouUniversity/KeyL
3、aboratoryofCropPhysiology,EcologyandCultivationintheMiddleandLowerReachesoftheYangtseRiverofMinistryofAgriculture,Yangzhou225009,China;2TheComprehensiveServiceCenterofAgriculturalExtensionofDongtaiTownship,Dongtai224200,China;∗Correspondingauthor,E-mail:ljliu@yzu.edu.cn)Abstract:
4、【Objective】Weaimtorevealtheeffectsofalternatewettingandirrigationduringwholegrowthperiodongrainyieldinricecultivarswithdifferentdroughtresistanceanditsphysiologicalmechanisms.【Method】Withfourricecultivarsdifferedindroughtresistance,Yangdao6andLiangyoupeijiu(indica),Hanyou8andZhen
5、dao88(japonica),asmaterials,threewatermanagementregimes,i.e.CI(conventionalirrigation),WMD(alternatewettingandmoderatedryingirrigation)andWSD(alternatewettingandseveredryingirrigation)duringthewholegrowingseasonwereconductedtoinvestigatetheireffectsongrainyieldinapotexperiment.【R
6、esult】ComparedwithCI,WMDsignificantlyincreasedthegrainyieldsofYangdao6andHanyou8withhigherdroughtresistanceby6.9%and7.5%,anddecreasedthoseofLiangyoupeijiuandZhendao88withlowerdroughtresistanceby7.28%and8.10%,respectively.UnderWSD,thegrainyieldsoffourcultivarsalldecreasedsignifica
7、ntly,buttheyielddeclinesinLiangyoupeijiuandZhendao88weremuchhigherthanthoseinYangdao6andHanyou8.UnderWMD,rootoxidationactivity,cytokinin(zeatin+zeatinriboside)contentinrootsandleaves,leafphotosyntheticrateandwaterpotential,activitiesofenzymesinvolvedinsucrose-to-starchconversioni
8、ngrainswereallsignificantlyincreasedinYa
