塞罕坝3个树种内在水分利用效率与生长的关系及其对气象因子的响应

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中图分类号：S718.43 文献标志码：A 文章编号：1673-923X（2025）08-0086-09

【结论】综合3个树种iWUE的变化及其与BAI的关系来看，云杉对未来该地区暖干化气候变化的适应能力更强，华北落叶松适应能力相对较差。

Abstract：【Objective】Toinvestigatetherelationshipbetweenintrinsicwater-useeficiency（iWUE）andforestgrowthofdiferent fforestationspciesndteirsponsetometeorologicalfctorsitheianbaareaandtoprovideaientificasisforforest management intecontextofglobalwarming.【Method】TisstudytookLarixprinciis-rupprechti，Pinus sylvestrisva.mongolica andPicedmeyeriintheSanbaareaasthsearhobjects，andanalyedterelationshipbetweeniWUEandBAIandteirsponss toindicatorssuchastemperatureandSEasedonthmatoloyofthaalingsoftetreandsablebonsotoeteues. 【Result】Theesultsoftestudyshowedthatthewateruseefciencyofallthreetreespeciesshowedagradualinreaseoverthe4- yearperiodfrol975tolnddsiilarinteranaltredsutteateoficreasevaredfrofstesttoowesteicea meyeri，PinussylvestrisandLarix principis-rupprechtiiwhichroseat ratesof9.7o，5.75and 4.40μmol⋅mol-1⋅（10a）-1 BAIofLarix principis-rupprechtiishowed a significant negative correlation with iWUE （P<0.01）′ ）.There was a positive correlation between BAI and WUEi inPiceameyeri，butitdidnotreachasignificantlevel （P>0.05 ）and therewasno significantcorrelation betweenBAI andiWUE ofPinusylvestris;TeiWUEofalltreespeciesassignificantlyndposiivelycorelatedwithteaveragetemperatureinJulyand thegrowingseaonofteagativelyoeaedwithenfallinJulydgroingsasonandignftlydtiely corelatedwiththeSPEIinallperiods.【Conclusion】CombiningthechangesiniWUEofthethreespeciesandtheirrelationshpwith BAI，Piceameriisoedptabletofreadrgategeinidixpispeisaiely less adaptable.

Keywords：Larixprincipis-rupprechti;Pinus sylvestris;Piceameyeri，radialgrowth;climaticfactors;iWUE

当前，全球气候变暖对树木的生长与分布产生影响。（剩余14506字）