建立相似林分样木因子回归模型推算采伐木蓄积

在安化县杉木人工林相似林分内设立样地,测量样地对角线上26株林木的地径、胸径和树高,用Excel软件建立地径与胸径、胸径与树高的回归模型,再测量采伐木地径,用回归模型预测采伐木的胸径和树高,推算采伐木蓄积量。同时,采用地径一元立木材积表法测算林木蓄积量,并与采伐作业设计的二元立木材积表法测算的林木蓄积量相比较。结果表明:采用建立相似林分样木因子回归模型推算采伐木蓄积量方法接近采伐作业设计的蓄积量。

Establish a regression model of similar forest stand sample tree factor to project the harvested wood stock volume

Establish the sample plot of similar stand of Chinese fir plantation in Anhua County, and measured the diame- ter, DBH and height of 26 trees in diagonal of sample plot. Using the Excel software to build the regression model for DBH, tree height and diameter, and then measured the diameter harvested wood, using regression model to predict the DBH and height, to project the stock volume of harvest wood. Meanwhile, we compare with the projection of stock volume with the one variable DBH stand volume method and binary stand volume method of timber operation design. The results show that： establish a regression models of forest similar stand sample tree factor to project the harvested wood stock vol- ume is close to stand volume method of timber operation design.