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掌握林分的生长与立木密度之间的数量关系,是控制单位面积产量,培育目的材种,科学经营森林的重要条件。为此,我们就吉林省人工落叶松林和天然次生林,探讨了密度效应数学模型及其图象,绘制了五种森林类型的林分密度控制图。随着森林经营强度的提高,密度控制图将成为定量间伐和生长预测的重要工具,对于资源调查、造林设计、更新普查和经营管理也能提供参考性数量指标。
Grasping the quantitative relationship between stand growth and standing tree density is an important condition for controlling the yield per unit area, cultivating the target timber species, and scientifically managing the forest. For this reason, we discussed the mathematical model of density effect and its image on artificial larch forests and natural secondary forests in Jilin Province, and plotted the density control maps of five forest types. With the improvement of forest management intensity, the density control chart will become an important tool for quantitative thinning and growth prediction. It can also provide reference quantitative indicators for resource investigation, afforestation design, update census and management.