在森林抚育采伐作业过程中,要进行伐前或伐后的林地清理。其方法有全清和半清两种,近几年有些同志主张全清,并且认为清理的越干净越彻底越好。为了搞清两种清林方式究竟哪一种好?我们于1981年冬,在梨讨林场采伐作业的伐区内选设了各项林分因子基本相同的9林班中的10和11两个小班,用两种不同的清林方式搞了一次实验对比,并在1986年秋又进行了复测调查,其结果是:从经济效益看,在9林班11小班 In the process of tending and cutting of forests, clearing of forest land before or after cutting shall be carried out. The method has two kinds of all-clear and half-clear. In recent years, some comrades advocate full-scale clean-up and think that the cleaner and the cleaner the more thorough the better. In order to find out which type of Qinglin approach is better, in the winter of 1981, we selected 10 and 11 of the 9-forest classes with the same stand factors A small class, with two different way to engage in an experimental comparison of Qinglin, and in the autumn of 1986 and conducted a retest survey, the result is: from the economic point of view, 11 classes in 9 forest classes