嶗山針闊混交林林分結(jié)構(gòu)與林木生長特征

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Abstract：Temperate needle and broadleaved mixed forestsare typical vegetation intemperate areas in China，which plays anessentialand irrplaceableroleintheprotectionoftheregional ecologicalenvironment.Inordertoexplore the tree interaction and its impact on tree growth， this study investigated a 1hm2 fixed forest plot and selected three species configuration combinations respectively in Beijiushui of Laoshan Mountain： I with 100% evergreen conifer species， I with 60% deciduous broadleaves +40% evergreen conifer species，and II with 40% deciduous broadleaves +60% evergreen conifer species.The characteristics of the stand spatial structure，growth and the influence ofthe stand structureon stand growthareanalyzed.Theresultsareasfollows：（1）Thediameterdistributionofthedominanttreespeciesinthis foreststand showedanobvious inverted"J"typecurveorskewednormaldistribution，revealingthat thestanddevelopssteadily.（2）The angularscalesofdifferentrespeciesconfigurationsweremainlyrandomlydistributed，andthemixingdegreewasweak.In themixedconfigurationofneedle-broadleavedtree species，thesizeratioofOwasrelativelyhigh.（3）There weresignificant differences in stand basal area and above-ground biomass in different tree species configurations （P<0.001） ，and the stand growthofmixed needle-broadleaved tree speciesconfiguration typewaslarger. （4）Thesmalerthesizeratioor the higher themixigdegree，thelarger was forestbasalareaand tree biomassof thestand.Inconclusion，the mixedconfigurationof needle-broadleavedtreespeciescanallviatethecompetitionamongtrestoacertainextent，erichthesizeratioofdjacent tres andtheratioof diferent speciesand promotethe forest succession and productivity.These findings should be paid attention to in forest management.

Keywords：Foreststandspatialstructureparameters;adjacent trees;biomassbasalarea;treespeciesconfiguration

林分空間結(jié)構(gòu)反映了樹木在空間中的分布狀態(tài)，對森林可持續(xù)經(jīng)營和物種多樣性維持具有重要意義[12]。（剩余11870字）