论文部分内容阅读
通过调查福建省龙岩市126个伐区标准地的样木,选用严若海1992年提出的立木削度方程,建立了龙岩市杉木、马尾松、阔叶树三个立木削度模型,方差分析表明模型线性回归关系极显著。经伐区标准地检验和近三年多来的实际应用,出材量误差率基本小于10%,达到伐区调查设计的精度要求,弥补了任意造材分径阶出材量计算的空白,成为福建省龙岩市源头计征税费,精确评估立木价值的计算依据。
Through the investigation of sample wood from 126 cutting areas in Longyan City of Fujian Province, we selected the vertical taper equation proposed by Yan Ruohai in 1992, and established three vertical tapping models of Chinese fir, masson pine and broad-leaved tree in Longyan. The variance analysis showed that the model linearity Regression is extremely significant. The standard test of the cutting zone and the practical application in the past three years show that the error rate of the material output is basically less than 10%, which meets the precision requirements of the investigation and design of the cutting area and makes up for the blank of the calculation of the material output of the arbitrary diameter step. Become the source of Longyan City, Fujian Province, levy taxes and fees, accurate assessment of the legislation based on the value of wood.