广西大明山云贵山茉莉林的空间结构

利用混交度、大小比数和角尺度分析广西大明山云贵山茉莉林的空间结构。结果表明：云贵山茉莉林林分的树种空间配置以中、强度混交为主，优势树种云贵山茉莉多呈单种聚集；林木大小比数随胸径的增大呈迅速减小的趋势，小径阶林木多明显受压。中径木处于中庸状态，大径木占优势地位；林分整体和多数径阶的林木分布格局属聚集分布。

The Spatial Structure of houdendron BiarIstatum Forest in Daming Mountain Nature Reserve,Guangxi

Three structure parameters （mingling intensity, neighborhood comparison and uniform angle index） were employed to analyze the spatial structure characteristics of Houdendron biaristatum forest in Darning Mountain Nature Reserve, Guangxi.The results showed that mingling intensity of H. biaristatum forest was middling or the most intensive, and H. biaristatum was the dominant species in the forest, which exhibited aggregation of single species. Neighborhood comparisons decreased with increasing diameter classes, with the small trees being suppressed, the large trees being superior, while the middle trees being in a kind of intermediate status. Meanwhile, aggregation distribution was the spatial pattern of either the forest or the most diameter classes.