小兴安岭红松针阔混交林林分空间结构分析

用角尺度、混交度、大小比数3个空间结构参数对黑龙江省凉水自然保护区的红松针阔混交林进行分析,用Hegyi竞争指数分析种内种间竞争关系,为制定合理的森林保护措施提供依据。分析结果表明:林木分布格局为随机分布;总体来看该林分处于强度混交向极强度混交过渡的状态,单一树种聚集在一起的情况较少,大多与其它不同树种混交;各树种在林木大小分化程度上存在很大差异,针叶树种较占优势,阔叶树种则分化严重,既有占优势树种又有受压树种;林分的种内竞争大于种间竞争。

Spatial Structure Analysis of Coniferous-broadleaved Korean Pine Mixed Forest in Xiaoxinganling Mountains

To provide a reasonable basis for protecting forest resources, three parameters, namely neighborhood pattern, ming- ling, and neighborhood comparison, were used to analyze eoniferous-broadleaved Korean Pine mixed forest in Liangshui nature re- serve, Heilongjiang province. Based on the Hegyi competition index, the intraspecific and interspecific competition were analyzed. Results indi6ate that the stand shows a random distribution pattern, which is a complicated community composed of different species under a transition state from high degree to extremely high degree, with rarely single-species aggregation, but mostly mixed with other ones. There is a big difference for advantage in DBH among each species. Conifer species has certain advantage in domination, while clear differentiation exist in broadleaved trees. Some are dominant and some are oppressed, with intraspecific competition greater than interspecific competition.