贵州雷公山闽楠群落调查分析

目的]了解雷公山闽楠(Phoebebournei(Hemsl.)Yang)群落物种组成及群落结构特征,为保护和利用闽楠提供一定的理论依据.方法]采取样地调查方法对雷公闽楠群落进行调查分析.结果]闽楠群落的植物种类组成有14科16属17种,其中蕨类植物2科2属3种,无裸子植物,被子植物12科14属14种;群落的植物以热带分布区系的类型占优势,占57.14％;闽楠在乔木层占有绝对优势,重要值达到79.33;龄级结构为I级数量最大,从Ⅱ级到V级的株数是一个相对均衡的状态,群落结构稳定;闽楠的更新方式为聚集母树下更新和扩散更新两种,聚集母树下更新明显,扩散更新主要在沟谷和郁闷度大的林分中进行.结论]封山育林是恢复雷公山区闽楠种群数量的有效途径.

The Investigation on community characteristics of Phoebe bournei in Leigongshan Mountain

【Purpose】In order to understand the community species composition and community structurecharacteristics of Phoebe Bournei(Hemsl.Yang)in Leigongshan Mountain,It provides a theo?retical basis for the protection and utilization of Phoebe Bournei.【Method】The community was investi?gated and analyzed by sampling survey method.【Result】The results showed that there were 17 species belonging to 16 genera and 14 families inPhoebe bournei community,including 3 species belonging to 2 families and 2 genera of ferns,3 species belonging to no gymnosperms and 14 species belonging to 12 families and 14 genera of angiosperms.The predominant flora in the community was tropical flora,ac?counting for 57.14%.Phoebe bournei occupies an absolute advantage in the arbor layer,with an impor?tant value of 79.33%.The number of plants from grade II to Grade V was relatively balanced,and the community structure was stable.The regeneration methods ofPhoebe bournei include aggregation mother trees and diffusion trees.The regeneration of aggregation mother trees are obvious and diffusion regenera tion is mainly carried out in gullies and stands with high degree of depression. 【Conclusion】It is an ef?fective way to restore the population ofPhoebe bournei in the Leigongshan Mountain by strengthening theefforts of mountain closure and forest cultivation.