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由林分中的优势木和亚优势木的树冠面积，作为单株林木最适宜的生长发育空间，来确定合理的林分密度．并依据林木胸径和树冠面积的密切关系，最终由林分平均胸径来确定林分的最适密度和经营密度．
From the canopy area of the dominant and sub-dominant species in the forest stand, the most appropriate growth and development space for the individual forest species is to determine the reasonable stand density. According to the close relationship between DBH and crown area, the optimal DBH and management density of the stands were finally determined by the average DBH of the stands.