杉木人工林直径分布模型

The Diameter Distribution Model of Cunninghamia lanceolata Plantation

应用威布尔分布函数描述杉木人工林直径结构规律,采用参数回收技术建立直径分布模型 该模型主要由林分因子、单木二元材积方程和材种出材率等子模型组成 应用该模型,只要输入现实林分年龄、地位级指数、每公顷断面积和株数,就能输出未来林分蓄积量、出材量及平均胸径、平均高、株数等因子 并探讨了该模型在用材林林木资产评估。

This paper studied the diameter structure law of Cunninghamia lanceolata plantation by using the Weibull distributing function,and established the diameter distribution model according to the parameter recover technique. The system of diameter distribution model contained three parts:the stand factor,two variables volume equation of individual tree and out put of wood sort. Using the model,the future volume,outturn,mean DBH,mean tree height and tree number would be worked out when input the available stand age,site class index,basal area per hectare and tree number. Furthermore,this paper also discussed the application of diameter distribution model to the forest property evaluation and the confirming of the forest economic maturity.