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影响云冷杉混交林天然更新效果的因素有很多,哪种因素起的作用大,仅用定性分析难以做出判断。本文采用灰色系统理论中的关联分析法,对影响云冷杉针阔混交林天然更新的因素进行排序分析。排序结果依重要性由高到低为:海拔高度、蓄积量、林木株数、郁闭度、坡度、腐殖质厚度、针叶树株数、针叶树蓄积比重。在人为可以控制的因素中蓄积量得分最高,其次是林木株数、郁闭度、针叶树株数、针叶树蓄积比重。
There are many factors that affect the natural regeneration effect of Fir mixed forest, which factors play a large role, it is difficult to make judgments by qualitative analysis only. In this paper, we use the gray system theory to analyze the factors that affect the natural regeneration of spruce-fir and broad-leaved mixed forests. The results of descending order of importance are as follows: altitude, stock volume, number of forest trees, canopy density, slope, humus thickness, number of conifer trees, coniferous stock volume. Among the factors that can be controlled by man, the highest accumulation was observed, followed by the number of trees, canopy density, the number of coniferous trees and the proportion of coniferous trees.