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本文通过对落叶松人工中近熟林大径材定向培育试验区与其它保留密度试验区的调查分析比较得出；大径材培育措施可以提高林分的直径、树高和材积生长量；获取较高的间伐经济效益；改善林内的光照条件，增加林冠下植物种类和覆盖度；增强林冠下植物天然更新能力，促进异龄复层混交林的形成，缩短培育周期。林冠下人工更新红皮云杉等耐阴树种，大径材培育试验区比其它试验区生长良好。同时，对常规落叶松人工林进行大径材定向培育的时间和保留密度等方面提出了初步建议。
In this paper, the Larix Diaogale artificial near-mature forest directional cultivation test area and other retention density test area comparison analysis obtained; large diameter timber cultivation measures can improve the stand diameter, tree height and volume growth; access Higher economic benefits of thinning; improve the light conditions in the forest to increase the species and coverage of plants under canopy; enhance the natural regeneration ability of plant under canopy, promote the formation of heteromonic mixed forest and shorten the incubation period. Artificial regeneration of spruce tree species such as Picea koraiensis under canopy canopy, and the test area of big diameter wood cultivation grew better than other experimental areas. At the same time, some preliminary suggestions were put forward on the time and density of large-diameter timber cultivation in general larch plantation.