江西大茅山常绿阔叶次生林与人工林生物多样性分析

The Analysis of Biodiversity of Ever green Broad leaved Second Growth and Plantation in Damaoshan Mountain,Jiangxi Province

对江西省大茅山封山育林后的常绿阔叶次生林和杉木人工林的群落组成、物种多样性差异、林分生长状况和地上部分生物量进行了研究，结果表明：阔叶次生林和杉木纯林的群落组成特征差异明显；阔叶次生林的生物多样性指数（Ｓｉｍｐｓｏｎ指数、群落均匀度、物种丰富度）均比杉木纯林高；在相同立地条件下，阔叶次生林的单位面积蓄积量和年生物量低于杉木纯林。

In 1995,the community characteristics of the ever green broad leaved second growth and the Chinese fir plantation were investigated in Damaoshan Mountain,Jiangxi Province. Their biodiversity difference were studied and their forest growth condition and the amount of above ground biomass compared. The results show there are distince differences of community characteristics between them,and the biodiversity indices (Simpson diversity index,species richness of community,community evenness) of the second growth are higher than those of the plantation,under the same site conditions stock and growth in unit area of the second growth are lower than those of the plantation,but above ground biomass of the second growth is higher. All these results proved that the closing of forest area played a positive role in protecting biosources and biodiversity.