通过调查百山祖北坡250 m×200 m样地内木荷分布和胸径/基径情况，分析种群的径级结构，并采用方差均值比（Cx）、负二项参数（K）、丛生指数（I）平均拥挤度（m*）与聚块性指标（C）5个分布格局指标评估比较该常绿阔叶林中木荷不同生长阶段的分布格局。结果表明：木荷种群径级分布呈现双峰型，幼苗和中等大小的树木较丰富，种群更新基本良好；从整个种群和不同发育阶段来看，木荷的分布格局都呈聚集分布，但随年龄增长，聚集度逐渐降低；种子扩散限制、生境异质性是形成木荷聚集性分布格局的主要原因；由于种内竞争和密度制约效应使木荷的聚集度随着植物的生长不断下降。%To study the population structure and spatial distribution pattern of Schima superba, a permanent plot of 5 hectares was established in the north slope of Baishanzu Nature Reserve of Zhejiang in 2003. Location and size of eachS. superba individuals in the plot was recorded in 2003 and checked in 2008. The size structure of the population ofS. superba was analyzed. Distribution pattern at different growth stages was assessed by variance/mean value, negative binomial parameter, index of mean crowing and of patchiness. The results showed that diameter distribution of the population was bimodal, with abundant seedlings and medium-sized trees, which indicating good regeneration in the plot. The results also showed that the population ofS. superba at different growth stages had clumped distribution pattern, but the clumping degree was decreased with tree age. And the distribution pattern was formed by seed dispersal limitation and habitat heterogeneity, as well as by intraspecific competition and density.
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