桂南不同造林模式对植物物种组成和多样性特征的影响  

Effects of Different Afforestation Modes on Characteristics of Plant Composition and Diversity at South Guangxi

作　　者：隆卫革[1] LONG Wei-ge(Guangxi Eco-engineering Vocational and Technical College,Liuzhou,Guangxi 545004)

机构地区：[1]广西生态工程职业技术学院,广西柳州545004

出　　处：《安徽农业科学》2024年第8期106-109,119,共5页Journal of Anhui Agricultural Sciences

基　　金：广西高校科学技术研究项目(KY2015430)。

摘　　要：[目的]摸清不同造林模式林下植物多样性特征及变化规律,为探寻科学、合理的人工林种植模式提供理论依据。[方法]以广西藤县3种常见造林模式林(纯林、混交林、人工-天然混交林)为研究对象,采用典型取样法,对林下灌木层、草本层从植物种类、物种多样性指数和相似性关系等方面进行分析。[结果]纯林、混交林和人工-天然混交林灌木层和草本层的物种数分别为33、36、29种和32、29、9种。3种造林模式灌木层优势植物种为玉叶金花和地稔,混交林和人工-天然混交林草本层优势种为铁芒萁,求米草为纯林优势种。灌木层物种多样性指数均以人工-天然混交林最高,纯林最低,除均匀度指数外,Shannon-Wiener指数、Simpson指数和丰富度指数在人工-天然混交林和纯林间存在显著差异(P<0.05),草本层物种多样性在不同造林模式间差异均不显著(P>0.05)。灌木层、草本层物种相似性系数均普遍较低。[结论]混交林和人工-天然混交林物种多样性高,是未来林地经营培育的方向。[Objective]In order to find out the characteristics and changes of undergrowth plant diversity in different afforestation modes,and to provide theoretical basis for the exploration of scientific and reasonable planting patterns of plantation.[Method]Taking three common afforestation modes(pure plantation,mixed plantation and man-natural mixed plantation)as the research object,typical sampling method was adopted to analyze the understory shrub layer and herb layer from plant species,species diversity index and similarity relationship.[Result]The results showed that the number of species in shrub layer and herb layer in pure plantation,mixed plantation and man-natural mixed plantation were 33,36,29 and 32,29,9,respectively.The dominant species in the shrub layer of the three afforestation modes were Melastoma dodecandrum and Mussaenda pubescens,the dominant species in the herb layer of the mixed plantation and the man-natural mixed plantation was Dicranopteris linearis,and the dominant species in the pure plantation was Oplismenus undulatifolius.In addition to evenness index,Shannon-Wiener index,Simpson index and richness index had significant differences between man-natural mixed plantation and pure plantation(P<0.05),while species diversity in herb layer had no significant differences between afforestation modes(P>0.05).The similarity coefficients of shrub layer or herb layer were generally low in the three afforestation modes.[Conclusion]The high species diversity of mixed plantation and man-natural mixed plantation is the direction of forest management and cultivation in the future.

关 键 词：造林模式 混交林 灌草层 植物多样性 

分 类 号：S727[农业科学—林木遗传育种]