摘要
ToinvestigatedifferencesinphysiologicalcharacteristicsofgrowthandphysiologicalbasisofhighgrowthvigorinthefirstgenerationofPopulusdeltoideswhicharefromdifferentgrowthvigorclones,herewechosetwogroupsofseedlingswithdifferentgrowthvigor:high（A）andlow（B）.Indexesofphenotypeandphysiologyweresuccessivelymeasuredtostudythegrowth,photosynthesisandnutrientabsorption.Thereweresignificantorverysignificantdifferencesindrymassofroot,stem,leafandthetotalbiomassbetweenAandB.Drymatterofrootshadthesmallestproportionindifferentcomponents,andthelargestproportionwassteminA,whiletheleafhadthelargestproportioninB.ChangesingrowthandphysiologicalcharacteristicsshowedacertainregularityduringJunetoSeptember.AllclonesgrewthemostrapidlyandphysiologicalcharacteristicsvariedthemostsignificantlyinJuly.Correlationanalysisshowedthatseedlingheightandgrounddiameterwerebothsignificantlycorrelatedtoleafarea,nightrespirationrate,NH4-uptakerateandthetotalphotosyntheticrate（R>0.826,P<0.05）,suggestingthattheseedlinggrowthwasmainlyaffectedbytheirowntotalphotosyntheticcapacity,nutrientabsorptionandnightrespirationconsumption.Ingeneral,AwassuperiortoBinallthesefactors,whichconstructphysiologicalbasisofthehighgrowthvigor.
出版日期
2012年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
