ESTABLISHMENNT AND APPLICATION OF DENSITY CONTROL DIAGRAM OF JAPANESE LARCH STAND

In this paper, the proportional method of total area of tree crown was used to establish the density control diagram of Japanese Larch stand for determining the maximum density line.In order to improve the precision of the stand density control diagram, we used the total nonlinear interative method to improve the values of equivalent diameter and equivalent tree height line. When determining the most suitable stand density that is the management index, the index of annual mean increment of the standard plot, the index of mean value of annual maximum increment of analytic trees and the ratio index of crown length to tree height were adopted. These methods were used for the first time in China,