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林分生产力与林分结构有密切关系。其中林木直径的分布规律是林分结构的基本规律。在同令林中,随着林令的增长,林木胸径的生长速度,出现差异,致使各径阶株数发生变化。其中,大多数林木位于林分平均直径附近,最粗和最细的林木较少。这是林木株数按径阶分布的一般规律。然而不同地区、不同树种的具体分布规律,仍然有所区别。为探明不同地区落叶松人工林不同生长阶段的胸径分布规律,对我省的净月潭、土们岭、松花湖、桦甸、蛟河、敦化、延吉、龙井、安图、通化、东丰等地的林分,做了如下分析。
Stand productivity and stand structure are closely related. Among them, the distribution of tree diameter is the basic law of stand structure. In the same order of forest, with the growth of the woods, the growth rate of the breast diameter at breast height, there are differences, resulting in changes in the number of strains of various orders. Among them, most of the trees are located near the average diameter of the stands, with the thinnest and the thinnest ones. This is the general rule that the number of trees should be distributed in a radial order. However, the distribution of different tree species in different regions is still different. In order to find out the distribution of DBH at different growth stages of larch plantations in different areas, we analyzed the DBH distribution of Jingyuetan, Tulumong, Songhuahu, Huadian, Jiaohe, Dunhua, Yanji, Longjing, Antu, Tonghua, Feng and other places of the forest, made the following analysis.