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为探索不同强度的间伐对林木生长的影响,为给合理间伐落叶松人工林提供技术依据,我局近几年来利用固定样地进行了逐年观察。现将其结果整理如下; 调查地点与方法人工落叶松间伐试验地,位于东沟林场洋沟子经营区,77林班东山脚下,西北坡向,坡度平缓。1965年春季造林,面积约八公顷左右,密度为6600株/公顷,保存率在90％以上。1974年曾进行过一次抚育间伐。1979年局设计队在该地选择4.94公顷作为试验地。为了长期观察的需要,根据不同的因子、不同的间伐强度划分了两个小班,每个小班内设0.1公顷
In order to explore the effect of thinning with different intensities on forest growth, in order to provide technical basis for reasonable thinning of Larix gmelinii plantation, our bureau conducted a yearly observation using fixed plots. Now the results are organized as follows; Survey sites and methods Artificial larch thinning test site, located in the Donggou Lin Yanggou business area, at the foot of the forest at the foot of the East Forest 77, northwest slope, gentle slope. The spring of 1965 afforestation, an area of about eight hectares, the density of 6600 plants / hectare, the preservation rate of 90%. In 1974 there was a tending thinning. Bureau Design Bureau in 1979 to select 4.94 hectares as a test site. For long-term observation needs, according to different factors, different thinning intensity divided into two small classes, each small class with 0.1 hectare