闽西北丘陵地毛竹林下植物多样性的研究

Plant diversity under Phyllostachys pubescens forests in hilly area of northwest Fujian province

在标准地调查的基础上,采用物种丰富度指数Patrick指数、多样性指数Simpson指数、ShannonWiener指数、物种均匀度指数Pielou指数和Gini指数,分析了6毛竹4杉木、8毛竹2杉木、7毛竹3木油桐、10毛竹、9毛竹1樟树5种毛竹林下物种组成及多样性及其差异。结果表明:5种毛竹林灌木层植物物种数依次为34、38、47、46和14种,共有102种;草本层依次为53、34、47、39和24种,共有121种;林分相似性结果显示,5种毛竹林分间差异较大;灌草层物种多样性指数表明,5种毛竹林下植物多样性有差异,灌木层物种多样性最高为7毛竹3木油桐,最低为9毛竹1樟树;草本层物种多样性最高为7毛竹3木油桐,最低为8毛竹2杉木。综合分析表明,在闽西北丘陵地毛竹林中,7毛竹3木油桐的林下植物多样性最高,该类型能够促进毛竹林灌草植物多样性恢复和改善。

Based on the investigation of the sample plots, the species composition and diversity of shrub and herb layers under mao bamboo forests in the hilly area of northwest Fujian province, including 6 mao bamboo 4 fir（S-F）, 8 mao bamboo 2 fir（E-T）, 7 mao bamboo 3 mu-oil tree（S-T）, pure mao bamboo stand （P） and 9 mao bamboo lcamphor treeCN-O）, were studied by adopting the methods of Patrick index, Simpson index, Shannon-Wiener index, Pielou index and Gini index. In the 102 species plants identified of in the shrub layer, there were 34, 38, 47, 46 and 14 species for the stands of S-F, E-T, S-T, P, N-O respectively, while 121 species plants in the herb layer, there were 53, 34, 47,39 and 24 species for the five stands respectively. The results of stand similarity analysis reveals that there were big differences among the five mao bamboo forests; the species diversity indexes for five mao bamboo forests in the shrub and herb layers were different from each other. The type which had the highest species diversity in shrub layer was 7 mao amboo/3 mu-oil tree, while the lowest was 9 mao bamboo/1 camphor tree; the type which had the highest species diversity in herb layer was 7 mao bamboo/ 3 mu-oil tree, while the lowest was 8 mao bamboo/2 fir. According to the comprehensive analysis, 7 mao bamboo/3 mu-oil tree was the highest species diversity under mao bamboo forest, which can promote species diversity＇ s restoration and improvement under mao bamboo forest.