落叶松人工林材积-年龄Logistic曲线方程的拟合与分析

Fitting and Analysis of Logistic Curve Equation of Artificial Forest Product and Age of Larix gmelinii(Rupr.) Kuzen.

本文采用Logistic曲线方程对落叶松人工林单株材积-年龄进行模型拟合,对曲线方程求一阶导数、二阶导数,分别令其为0,求得落叶松单株材积生长的速生期出现在19-36年,高峰期出现在林龄28年。研究结果对于完善落叶松单木生长模型、制定合理的经营采伐措施具有一定的指导借鉴意义。

This paper adopted the Logistic curve equation for larch plantation age and individual volume model, solved the first derivative, two order derivative of the curve equation, and make them to 0, to obtain individual volume growth of L. gmelinii in fast - growing stage in 19 - 36 years, the peak appeared in the age of 28 years. The resuhs of this study can be used as a reference for the improvement of the single tree growth model and the establishment of reasonable management measures.