黎平县退耕还林地草本层物种组成与多样性  

Studies on Species Composition and Diversity of Forestland Converted from Cropland in Liping County

作　　者：王引乾[1] 孙保平[1] 赵岩[1] 周湘山[1] 钟晓娟[1] 

机构地区：[1]北京林业大学水土保持与荒漠化国家重点实验室,北京100083

出　　处：《山西农业科学》2011年第8期846-849,共4页Journal of Shanxi Agricultural Sciences

基　　金：国家林业公益性行业科研专项(201004018)

摘　　要：对黎平县不同配置模式退耕还林地草本层进行了物种组成及多样性调查,采用Shannon-Wiener物种多样性指数、Pielou均匀度指数和Margalef丰富度指数对比分析林下物种的多样性变化规律,结果表明,芭茅(Miscanthus floridulus)和野菊花(Flos Chrysanthenmi Indici)为研究区各类型退耕还林地常见的优势种;箬叶竹(Indocalamus longianritus)、节节草(Equisetum ramosissimum)、紫背天葵(Begonia fimbristipula)和黄连(Coptis chinensis)只在特定林下占优势地位;母猪藤(Herba Cayratica Jeponicae)、海金沙(Lygodium japon-icum)、鱼腥草(Houttuynia cordata Thunb.)、狗尾草(Setaria viridis)常作为伴生种促进林下物种多样性和生物量的积累。杉木作为优势乔木树种,对于林下物种多样性具有显著促进作用,桤木+香椿和麻栎+桤木的混交模式对于促进物种多样性占有优势。A survey of species composition and diversity of herb layer in different configuration modes of converting farmland to forestland in Liping county was carried out.The results showed that Miscanthus floridulus and Flos Chrysanthenmi Indici were the dominant species in almost all types of forestland converted from cropland.Indocalamus longianritus,Equisetum ramosissimum,Begonia fimbristipula,Coptis chinensis had the advantage only under some specific forest species,which indicated these herbaceous species had sensitivity of the understory habitat.Besides,as the companion species,Herba Cayratica Jeponicae,Lygodium japonicum,Houttuynia cordata Thunb.,Setaria viridis,usually increase in species diversity and biomass accumulation.There was also an advantage of promoting species diversity for the pattern of Alnus cremastogyne ＋ Toona sinensis/Quercus ＋ Alnus cremastogyne.

关 键 词：黎平县 退耕还林 配置模式 物种多样性 

分 类 号：S718.54[农业科学—林学]