鲁山国家森林公园油松、刺槐和侧柏人工林空间结构分析

Spatial structure analysis of artificial forest of Pinus tabulaeformis,Robinia pseudoacaia and Platycladus orientalis from Lushan National Forest Park

应用传统林分结构因子配合角尺度、大小比数2个空间结构参数分析了鲁山国家森林公园油松、刺槐和侧柏人工林的空间结构.结果表明,该园油松、刺槐和侧柏人工林的平均角尺度分别为0.484、0.503、0.504,分布方式均为随机分布;平均胸径大小比数分别为0.484、0.498、0.478,林分在大小比数为0～1的株数比例相差不大,说明林分不同径级的林木分布较均匀,林木个体分化程度较大.

We analyzed the spatial structure of Pinus tabulaeformis,Robinia pseudoacaia and Platycladus orientalis from Lushan national forest park with traditional stand structure indexes and two spatial structure indexes of uniform angle index and neighborhood comparison.Results show that the average angle indexes of Pinus tabulaeformis,Robinia pseudoacaia and Platycladus orientalis are 0.484,0.503 and 0.504.These data fit random distribution.Their average neighborhood comparison of DBH are 0.484,0.498 and 0.478,but the proportion of the strains whose neighborhood comparison of DBH is from 0 to 1 has not obvious distinction.This shows that the distribution of trees with different diameter levels is more even.However,differentiation degree of individual tree is more obvious.