人工杉木林单株径阶材种出材率表的编制

Compilation of Wood Outturn Percentage of Diameter Class per Plant of Artificial Chinese Fir Plantation

对树干开展削度方程的研究,既有利于基础性工作的需要,也是编制出材量和出材率表的需要。选择人工杉木林作为对象,用1 389株伐倒样木数据,通过干形分析和多指标比较,选定能拟合树干任意直径限处的材长、任意高度处的直径的最佳削度方程;通过计算机理论造材,编制出杉木单株径阶材种出材率表。该方法提高了材种数表的精度和可靠性。

Research on the taper equation for trunk is not only conducive to the needs of basic work,but also necessary to compile the output and yield table.Artificial Chinese fir forest was selected as the object,data of 1 389 cuttings were used,the optimal taper equation for fitting the length of the arbitrary diameter of the trunk and the diameter at any height were selected through the dry shape analysis and multi-indicator comparison.Based on the computer theory,the table of wood outturn percentage of diameter class per plant was compiled.This method improved the accuracy and reliability of the wood number table.