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我们自建场以来营造杉木林10,893亩,目前总蓄积量为182,365立方米,基本上达到速生丰产。我场造杉木林大部分采用每亩造300—400株。造林后4—6年,幼林就完全郁闭。此后,因造林密度的影响,林木树冠和根系的发展受阻,个体之间开始互相竞争,林分生长趋势开始减缓。因此必须进行抚育间伐,以减少单位面积上的株数,保证培育对象木的正常生长。为了探讨抚育间伐的有关问题,我们从
Since we established the site, we have constructed 10,893 hectares of Chinese fir forest. At present, the total stock volume is 182,365 cubic meters, basically reaching fast-growing and high-yielding. My field of fir plantation made mostly use 300-400 acre per plant. Four to six years after afforestation, the young canopy is completely closed. Since then, due to the influence of plantation density, the development of tree canopy and root system has been hindered. Individuals began to compete with each other and the stand growth trend began to slow down. Therefore, it is necessary to carry out tending thinning in order to reduce the number of trees per unit area, to ensure the normal growth of wood for cultivation. In order to explore the issue of tending thinning, we from