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森林的定量间伐,是当前国内外在森林抚育间伐中,研究和采用的一项新技术。由定性间伐过渡到定量间伐,是使森林间伐抚育工作由粗放到集约的一种手段。目前,以定量间伐确定保留株数的方法很多。利用林木直径生长的合理营养面积,依据胸径与冠幅的相关关系,确定林木的适宜密度,是当前林业生产中比较简单的一种定量间伐方法。本文对辽宁落叶松人工林,按直径与冠幅的相关关系,确定林分适宜密度的方法进行了探讨,现将初步结果简述如下。
The quantitative thinning of forests is one of the new technologies studied and adopted at home and abroad in the thinning of forests. The transition from qualitative thinning to quantitative thinning is a means of making forest thinning and tending from extensive to intensive. At present, there are many ways to determine the number of strains retained by quantitative thinning. According to the reasonable nutrition area of tree diameter growth, the suitable density of forest tree is determined according to the correlation between DBH and crown width, which is a relatively simple quantitative thinning method in forestry production. In this paper, the Larix principis-rupprechtii plantation, according to the relationship between diameter and crown, to determine the appropriate density of forest methods were discussed, the preliminary results are summarized as follows.