广西珍贵乡土树种人工林林下植物的多样性  

Diversity of Understory Plants in Plantations of Precious Native Tree Species in Guangxi

作　　者：黄康庭 周娟 陈晓龙 艾辉辉 梁明伟 王荣洁 余平福 HUANG Kangting;ZHOU Juan;CHEN Xiaolong;AI Huihui;LIANG Mingwei;WANG Rongjie;YU Pingfu(Guangxi Zhuang Autonomous RegionState-owned Daguishan Forest Farm,Hezhou 542800,Guangxi,China)

机构地区：[1]广西壮族自治区国有大桂山林场,广西贺州542800

出　　处：《桉树科技》2025年第1期49-56,共8页Eucalypt Science & Technology

基　　金：广西自筹经费林业科技项目(2023GXZCLK14)。

摘　　要：为提高珍贵乡土树种的经营水平,以江南油杉、闽楠、米老排和刨花润楠人工林为研究对象,采用主坐标分析(PCoA)与相关性分析,探究林下植物群落构成及其多样性指数,分析林分结构、生境因子与植物多样性指数的关系。结果表明:各林分灌草层主要植物种类不同,草本层植物物种数和多样性指数整体大于灌木层,江南油杉林下植物物种多样性最高,米老排和闽楠林下植物群落物种多样性较低;各林分灌木层之间的植物物种组成有显著差异,江南油杉和米老排草本层的共有种较多;灌木层植物多样性受林分结构、坡向和土壤厚度的影响,而草本层植物多样性主要受到林分结构的影响。为提升林下植物群落的物种多样性和森林质量,可适当间伐米老排等成熟林。In order to improve the management level of precious native tree species,taking the plantations of Keteleeriacyclolepis,Phoebe bournei,Mytilarialaosensis and Machiluspauhoi as research objects,principal coordinate analysis(PCoA)and correlation analysis were used to explore the composition of underforest plant communities and their diversity indices,and to analyze the relationships between stand structure,habitat factors and plant diversity indices.The main results indicated that all the diversity indices in shrub and herb layers varied greatly,the number of species and diversity indices in herb layer were generally higher than those in shrub layer,andspecies diversity of understory plant community of K.cyclolepis stands was the highest,while M.laosensisand P.bournei stands showed relatively lower diversity;Significant differences were observed amongshrub layers of different stands,with a relatively high number of shared species in herb layer of K.cyclolepis and M.laosensis forest stands;The diversity of shrub layer was influenced by forest structure,slope aspect,and soil thickness,but diversity of herb layer was primarily influenced by forest structure.To improve species diversity of understory plant community and quality of forest ecosystems,it is recommended to implement appropriate thinning measures in mature forest stands,such as M.laosensis stand.

关 键 词：乡土树种 人工林 物种多样性 林分结构 生境因子 

分 类 号：S718.5[农业科学—林学]