天山云杉人工幼林林分密度控制图的研制

林分密度控制图是按照林分测树因子中的树高（Ｈ）、胸径（Ｄ）、蓄积（Ｍ）与立木密度（Ｎ）之间相互关系建立数学模型进行编制的。它是以数日的形式来表达林分密度与单位而积蓄积量之间的数量变化关系。本文根据林分生长规律和密度效应法则介绍了天山云杉人工幼林林分密度控制图的编制过程及应用示例，它可应用于定量间伐、产量预估和资源清查等，是一种森林经营图，是集约经营的重要工具，具有直观、简明、应用方便的特点。

A Study on the Density Control Chart of the Tianshan Dragon Spruce Artihcial Young Growth Stand (TSSDCC)

The stand density control chart is worked out according to the mathematic model that is established on the basis of the relations between the tree height, diameter breast height,stock of the stand forest-mensuration factors and the stumpage density.The chart expresses the quantitative variative retation between the stand density and the stand stock per area in the form of the data and chart.This paper recommended the process of working out the TSSDCC and the applied example with the law of the stand growth and the rule of the density effect' The chart can be apllied in the intermediate cut,the estimation of the output,the resource inventory and so on, is a forest management chart,a tool of the intensive management,and has the objective, simple and clear,convenient feature.