摘要
以林分平均胸高直径的100倍为直径作圆形样地,得出林分每公顷胸高断面积等于圆形样地圆内的林木株数加上圆界上林木株数的一半。并根据标准地原理和角规测树原理进行了公式推导,利用了概率论原理对角规在100Dg圆绕测时,对圆外相割株数与圆内相离株数的理论数据近似相等性、互补性的假设进行了分析与论证。
The one - hundred - time forest stand average breast diameter as the diameter to make circleshaped sample results that section area of breast height per hectare equals to that the number of the forest timbers inside the circle plus an half of the number of the timbers on the circle boundary. And the formula has been deduced according to the principles of standard land and angle gauge; the hypotheses of the similarity and complementarity of the theoretical data have been analyzed and expounded by means of the theory of probability.
出处
《林业调查规划》
2005年第5期5-10,共6页
Forest Inventory and Planning
关键词
林分平均胸径100倍圆法
胸高断面积
角规测树
the method of one - hundred - time forest stand average breast diameter
section area of breast height
angle gauge
