巴山松人工林林下物种多样性及其影响因子

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关键词：巴山松（Pinushenryi）人工林；物种多样性；林分结构；影响因子

中图分类号：S78.5 文献标识码：A

文章编号：0439-84（2025）06-00-07

DOI：0.4088/j.cnki.issn0439-8114.2025.06.018 开放科学（资源服务）标识码（OSID）：

Understory species diversity and its influencing factors of Pinus henryi plantation

ZHANGMeng1，SONGFei²，CHENGong-ping，WANGYang1 （1.Hubei EcologyPolytechnicCollege，Wuhan4302O，China；2.Hubei AcademyofForestry，Wuhan430075，China; 3.State-owned Bashan ForestFarm of Badong County，Badong ，Hubei，China）

Abstract：ThespeciescompositionanddominantcharacteristicsofshrubandherbaceouslayersunderPinushenryiplantationswere investigated，andtheefectsofstandstructureandenvironmentalfactorsonspeciesdiversitywereanalyzedtoprovideabasisfor optimizing forest management measures to enhance understoryspecies diversity.Twelve fixed plots were established in P .henryi plantations in State-ownedBashanForestFarmofBadong Couty，Hubei Province.Speciescompositionanddiversitywereevaluated using indices such as importance value （ IV ）and Shannon-Wiener index.Redundancy analysis（RDA）was applied to reveal the mechanisms through which standstructural indicesand environmentalfactors（e.g.，aspect，canopyclosure）influencedunderstory speciesdiversityheresultsindicatedthat111shrubspecies（30families，54genera）and12herbaceousspecies（45families， 84 genera）were recorded.Shrub species richnesswas significantly positively correlated with aspect and stand density（ P<0.05 ）， while herbaceous species richness was significantly negatively correlated with stand volume （ P<0.05 ）and canopy closure（ P< 0.05）and positively correlated with openness （ P<0.01 ）.RDA revealed that aspect was the most critical factor influencing the species diversities of shrubs and herbs.Stand volume had a significant positive efect on shrub diversity （ P<0.05 ），while mingling degreeanduniformangleindexpositivelyinfluencdherbaceousdiversityAspect，canopyclosure，andminglingdegreewereidentified as key factors afecting understory species diversity under P . henryi plantations. Optimizing stand structure to improve the spatialdistributionofunderstorylightresourcescouldenhancespeciesdiversityandstrengthenthestabilityandfunctionalityofplantation ecosystems.

KeyWords：Pinus henryi plantation；species diversity； stand structure；influencing factors

林下植被是森林生态系统的组成，其丰富的物种多样性有助于维持土壤的养分循环、提升整体生物多样性，并促进森林的恢复和演替1，对于维持整个森林生态系统的健康与稳定至关重要[2]。（剩余8352字）