林分密度控制图,是表达林分生长与密度之间数量关系的图具。它由林分的等树高线,等直径线,等疏密度线,最大蓄积量——密度线和自然稀疏线组成。在森林经营工作中主要用于林分的定量间伐,生长量预测预报和资源清查规划等方面。为了在次生林经营中准确确定各项作业措施类型,合理控制间伐强度。我们在中国科学院林业 Stand density control chart, is to express the relationship between stand growth and density of the map. It consists of trees such as tree height line, such as diameter lines, such as density lines, the largest volume - density lines and natural sparse lines. In forest management, it is mainly used for the quantitative thinning of forest stands, the forecast of growth and the inventory planning of resources. In order to accurately determine the types of operations in the secondary forest management, the reasonable control of the thinning intensity. We are in the Chinese Academy of Forestry