科尔沁沙地赤松人工林林缘效应

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中图分类号：S718.5 文献标识码：A doi：10.13601/j.issn.1005-5215.2025.05.011

EdgeEffectofPinusdensiflora Plantationin HorqinSandyLand

Zhao Liang

（Management CenterofLiaoning Zhanggutai National Nature Reserve，Fuxin123ooo，China）

AbstractEdgeefectisoneoftheimportantconceptsofecologandbiologicalprotectio.Itplysanimportantroleinthestudyof ecological procesessuchasenergyflow，watercycleandnutrientcycleattheecosystemscaleand landscapeecosystemscale.Taking Pinusdensifloapantatioastheeseahject，teelatioshipetweenologicalfactorsDBHtreehighteigtofthefistliing branch，crown，iomassofeachorgan）andedgedistanceof6-yearoldPinusdensiflorawasanalyzedTheresultsshowedatthe edge effect bandwidth of 56-year-old Pinus densiflora plantation in sandyland was 10m .The DBH，crown and biomass of each organ showedpositiveedgeeectwhilethetreeheightandtheheightofthefrstlivingbranchshowedzeroedgeeffect.Thebiological index factors of Pinus densiflora within 10m were better，and the edge effect of the stand in the study area could be enhanced by thinning to improve the productivity of Pinus densiflora plantation.

Key WordsPinus densiflora;sandy land;tree crown;edge effect;biological factors

生态交错带内的物种种类及个体数量多于邻近生态系统的现象称为边缘效应。（剩余3761字）