黑龙江省9个杨树品种的抗旱性分析

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中图分类号：S722 文献标识码：A DOI：10.7525/j.issn.1006-8023.2025.06.011

Abstract：To identifysuperior poplar varieties adapted todiferent soil moisture conditions，thisstudy evaluated nine major cultivated poplar varieties in Heilongjiang Province—namely，Populus cathayana（JDQY），Populus deltiodesP. cathayana ZHF2，（PopulusXeuramericana） x （P.simoniixP.nigra）（2111），Populus euramericana‘N3016'×P.ussuriensis‘HQ-1’（HQY），P.alba LxP.berolinensis Dippel（YZY），1019，Populus‘Heifang-3’（QSY），406，andPopulus deltoides×Populus simonii‘LongFeng-2’（LF2）.Byapplyingtwo soil moisture gradients （milddrought，HL is 14%- （204号 18% ； moderate drought，HM is 6%-10% ），we systematically measured 14 morphological and physiological-biochemical indicators，including apparent morphology，leaf water content，relative chlorophyllcontent，ion metabolism，and antioxidantenzyme activities.Basedon principalcomponentanalysisand membershipfunctionevaluation，thedroughtresistance rankings were as folows：（1） under mild drought，JDQY，HQY，QSY，YZY，LF2，2111，406，ZHF2，1019; （2）under moderate drought，JDQY，HQY，2111，YZY，LF2，QSY，ZHF2，406，1019.Research indicated that， JDQY maintained osmotic balance by by significantly accumulating K+ and Ca2+ ，while HQY responded rapidly to oxidative stress viaelevated superoxide dismutase（SOD）activity，both exhibited broad-spectrum drought resistance under twotypes ofstress.Thisstudyreveals inter-varietal differences indroughtresistance and underlyingphysiological mechanisms among the nine poplar varieties，identifying JDQYand HQYas drought-tolerantcandidates.Thefindings provide atheoreticalbasis for stressresilient aforestation and precision treespecies selection incold，drought-prone regions Keywords：Drought stress；poplar； species selection;principal component analysis；membership function method

0 引言

黑龙江省地处东北地区，属高纬度寒冻地貌区，植被类型以温带针阔叶混交林和寒温带针叶林为主，是气候敏感区，同时也是我国气候变化最显著的区域之二[1]。（剩余17639字）