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优化生态公益林的空间结构是实现多功能经营的重要途径,以福寿林场马尾松生态公益林为例,选用角尺度、混交度、大小比数、改进的开敞度和林层指数5个空间结构指标分析了其空间结构特征。结果表明:林分混交度的平均值是0.29,处于弱度混交和中度混交的中间状态,说明树种混交程度低,林分结构稳定性差;林分平均大小比数为0.53,为中庸状态,林木的胸径差异不明显,没有呈现出明显分化的趋势;林分平均角尺度为0.52,为聚集分布;林分林层指数的平均值为0.39,垂直方向上的成层性较为简单;林分开敞度的平均值为0.29,表明林分内的林木生长空间不足。
Optimizing the spatial structure of ecological public welfare forest is an important way to realize multi-functional management. Taking the massonforest ecological forest in Fushou Forest Farm as an example, five dimensions of angle scale, degree of mixing, size ratio, improved open space and forest floor index The structural index analyzes its spatial structure characteristics. The results showed that the mean value of mixed stands was 0.29, which was in the intermediate state of mixed with moderate and mixed ones, which indicated that the mixed degree of tree species was low and the stability of stand structure was poor. The mean size ratio was 0.53, There was no significant difference in DBH between trees, and there was no obvious trend of differentiation. The average angular dimension of stand was 0.52, which was aggregated distribution. The mean value of forest stand index was 0.39 and stratification in vertical direction was relatively simple. The average of the openness is 0.29, indicating that there is not enough room for the trees to grow in the stands.