Nonlinear site index equations for several major Canadian timber species
Nonlinear site index equations for several major Canadian timber species
复制标题
加拿大几种主要木材树种的非线性场地指数方程
DOI：
10.5558/tfc50194-5
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发表时间：
1974
影响因子：
0.6
通讯作者：
B. Payandeh
中科院分区：
文献类型：
--
作者：
B. Payandeh
采用非线性回归分析和最小二乘近似技术推导出方程描述几个主要的加拿大木材树种公布的网站指数曲线。模型表达高度作为年龄和地位指数的函数，地位指数作为林分高度和年龄的函数。这些方程便于计算机处理地位指数信息。此外，身高方程相对于年龄的一阶偏导数提供了近似的年身高增长估计。
Nonlinear regression analysis and least-squares approximation techniques were employed to derive equations describing the published site index curves for several major Canadian timber species. Models expressing both height as a function of age and site index and site index as a function of stand height and age were developed. These equations facilitate computer processing of site index information. Also, the first partial derivative of height equations with respect to age provides approximate annual height growth estimates.