广西德保县观光木典型群落特征研究

Study on Typical Community Structure of Tsoongiodendron odorum in Debao County of Guangxi Zhuang Autonomous Region

在广西德保县观光木天然次生林中设置3个600 m^(2)的样地,调查观光木种群所在群落的物种组成、龄级结构、空间分布及物种多样性。结果表明:观光木群落植物种类丰富,共有维管束植物62科99属149种;群落以壳斗科的重要值最大,木兰科排第2位;乔木层的主要优势种为罗浮栲、黄杞和观光木;观光木种群各龄级结构稳定,Ⅰ级小苗数量较少;群落Shannon-Wiener指数、Simpson指数及相对丰富度均以灌木层最大。

Three 600 m^(2)plots were set up in the natural secondary forest with Tsoongiodendron odorum in Debao County of Guangxi Zhuang Autonomous Region.The community species composition,age class distribution,spatial distribution and species diversity of T.odorum were surveyed.The results show that the species is rich in the community of T.odorum,in which there are 149 vascular plants belonged to 62 families and 99 genera.The importance value is the maximum of Fagaceae and the second of Magnoliaecae in the community.The tree layer are dominated by the species of Castanopsis faberi,Engelhardia roxburghiana and Tsoongiodendron odorum.The age class distribution is stable in the community,but the population is small of classⅠ.The Shannon-wiener diversity index,Simpson diversity index and relative richness are the highest in shrub layer.