江苏省杨树二元材种出材率表的编制

The Construction of Outturn Table Based on Both DBH and Height Measurement for Poplar in Jiangsu

在分析几种削度方程的基础上建立了改进的四参数Sohumacher方程作为杨树削度方程,并编制了江苏杨树二元材种出材率表。经对不同立地条件下的杨树林分出材量的估计实验,表明该方程适合江苏省杨树生长,为进一步编制全省杨树二元材种出材率表提供了理论与实验方法。结合计算机理论造材方法,模拟林木生长规律,提高了编制材种出材量表的效率,保证了营林设计的材种出材量精度。提出的理论与方法可用于江苏杨树的收获估计,对提高杨树的科学经营管理水平具有重要的意义。

Based on the analyses of original taper functions, the improved Sohumacher equation with four parameters has been established as the taper equation of poplar in Jiangsu. Then, the outturn table for poplar in Jiangsu has been constructed. By experiment on the poplar stand of different siteindex, it shows that the equation fits the growth of poplar merchantable volume well, which can be used to estimate the yield of poplar stand in Jiangsu. The theory and method introduced in this paper have higher efficiency and also offers the good basic to construct yield tables of poplar stand. It has an important sense to enhance scientific management level and ensure estimating precision of yield prediction in poplar planning.