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我省许多国营林场,在进行抚育间伐作业中,使用标准表控制林分密度,以确定林分间伐强度。这种方法的实质,就是把现实林分密度降低到理想的疏密度,使林木有合理的营养空间,有利于林木生长。那么疏密度降低到某个数值时,需要间伐多少株林木呢?这是每个施工员所要解决的问题。为了解决这一问题,我们做了七十九块标准地,在标准地上收集间伐强度大小与疏密度递减的关系,以此作为基础材料,编制云南松降低疏密度与间伐木占总株数百分数换算表,以供有关单位和同志们参考使用。
Many state-owned forest farms in our province, during the tending and thinning operations, the use of standard tables to control the stand density in order to determine the separation of the intensity of the stand. The essence of this method is to reduce the actual stand density to the ideal density, so that trees have a reasonable nutrition space, is conducive to the growth of trees. So sparse density reduced to a certain value, the need to thinning how many trees it? This is every construction workers to solve the problem. In order to solve this problem, we made seventy-nine criteria to collect the relationship between the thinning intensity and the decreasing density of sparseness on the standard ground as the base material, and compiled the Yunnan pine to reduce the sparseness and the percentage conversion of thinning logs Table, for the relevant units and comrades for reference.