松阔混交林林分空间结构分析

Analysis of the Stand Spatial Structure of Pinus massoniana-Broadleaved Mixed Forest

摘要:

利用混交度、大小比数和角尺度3种结构参数结合树种组成，分析了松阔混交林林分空间结构。结果表明，优势树种马尾松多呈单种聚集，其余树种中、强度混交占了相当大的比例；马尾松在空间大小对比上占有一定的优势，其余树种则分化严重，既有占优势的树种，也有受压的树种：从林木水平分布格局上看，该地林分是以团状分布为主。

Abstract:

Stand spatial structure of Pinus massoniana and broadleaved mixed forest in Fujian was investigated using three structure parameters （mingling, neighborhood comparison, and uniform angle index-neighboring tree distribution pattern）. The results showed that P. massoniana was the dominant species in the mixed forest, which exhibited aggregation of single species, and the rest tree species were more or most intensive in mingling. When using neighborhood comparison method to characterize the size differentiation of trees, P. massoniana had an advantage over other species which differentiated seriously both in dominant species and suppressed species. Considering tree distribution pattern using uniform angle index, the stands in this community was found to be a clumped distribution.