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1、中国水稻科学(ChinJRiceSci),2017,31(4):400－408400http://www.ricesci.cnDOI:10.16819/j.1001-7216.2017.7035淮北地区氮高效高产型粳稻品种群体生长特征研究*梁健赵晨韩超任红茹陈梦云张洪程霍中洋*(扬州大学农业部长江流域稻作技术创新中心/江苏省作物遗传生理重点实验室,江苏扬州225009;通讯联系人,E-mail:huozy69@163.com)CharacteristicsofPopulationGrowthinjaponicaRiceVarietieswithHigh
2、NitrogenUseEfficiencyandHighYieldinHuaibeiArea*LIANGJian,ZHAOChen,HANChao,RENHongru,CHENMengyun,ZHANGHongcheng,HUOZhongyang(InnovationCenterofRiceCultivationTechnologyinYangtzeRiverValley,MinistryofAgriculture/KeyLaboratoryofCropGeneticsandPhysiologyof*JiangsuProvince,YangzhouUn
3、iversity,Yangzhou225009,China;Correspondingauthor,E-mail:huozy69@163.com)Abstract:【Objective】TheaimwastoclarifythecharacteristicsofpopulationgrowthofjaponicavarietieswithhighnitrogenuseefficiencyandhighyieldinHuaibeiArea.【Method】Theyieldcomponents,numberofstemsandtillers,leafare
4、aandpopulationbiomassproductionwereinvestigatedundertheiroptimumNlevelswith3representativejaponicavarieties[highNuseefficiencyandhighyield(HNUEHY),mediumNuseefficiencyandhighyield(MNUEHY),highNuseefficiencyandmediumyield(MNUEMY)]asmaterial.【Result】Numberofstemsandtillersincrease
5、dslowlytothepeakinjointingstageofHNUEHY,andthendecreasedgentlywiththehighestpercentageofproductivetillers.TheleafareaindexesofHNUEHYandHNUEMYwerethehighestandlowestatheadingstage.TheleafareaindexofHNUEHYwere2.53%and2.58%higherthanthatofMNUEHYandHNUEMY.Theorderofeffectiveleafarea
6、indexwasHNUEHY>HNUEMY>MNUEHY,theorderofhigheffectiveleafareaindexwasMNUEHY>HNUEHY>HNUEMY.Fromheadingtomaturitystage,thephotosyntheticpotentialsofHNUEHYandMNUEHYwere10.58%and9.86%higherthanthatofHNUEMY,showingnoobviousdifferencebetweeneachother.ThetotaldrymatteraccumulationofHNUE
7、HYwasslightlylowerthanthatofMNUEHY.Fromheadingtomaturitystage,thedrymatteraccumulationsincreasedwithincreasingyieldlevelwiththehighestratioforHNUEHY.Beforejointingstage,thecropgrowthrateofHNUEHYwaslowerthanthatofMNUEHY.Afterjoiningstage,thecropgrowthrateofHNUEHYwere8.79%and17.46
8、%higherthanthatofMNUEHYandHNUEMY.【Conclusion】Th
