毛竹林结构的动态特性

根据１９８５—１９９１年江西大岗山毛竹林的连续定位调查资料，分析总结了毛竹林结构的一般性特点及动态变化规律。竹高、竹枝下高、冠长、竹全重与竹胸径存在幂函数关系：Ｈ（ＨＬ、Ｌ、Ｗ）＝ａＤｂ，参数ａ随立竹度（Ｎ）变化，即ａ＝ａ’Ｎｂ；随立竹度提高，竹林生产力逐渐提高，竹株按年龄分布大致均匀化。竹株按径阶分布大多遵从威布尔分布，其中有一部分高生产力林分逐渐过渡为正态分布。

STRUCTURAL DYNAMICS OF BAMBOO FOREST STANDS

During 1985-1990 a continuous investigation was carried out in the bamboo (Phyllostachys pubescens) forests at the Dagangshan Experimental Centre, CAF, located in Jiangxi Province,to monitor the structural dynamics of stands. The research results showed that the correlations between DBH(D)and the culm length(H), clear length(HL), crown length(L) and total weight (W) could be expressed in power function,Db = H (HL,L,W),where the parameter, a, varies with stem stocking (N)a of bamboo stands. As the stem stocking rises, the stand productivity will go up, thus the age class distribution within the stand will tend to even out. The differentiation of diameter class generally followed weibull distribution in the stands, however, it would become a normal distribution in some stands with higher productivity.