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同龄纯林的直径分布呈正态分布或近似正态分布;异龄混交林或大地域的直径分布一般多呈近似双曲线形式的反丁形分布,这是广大林业工作者所熟知的直径分布规律。近年来,冠文正、陈振杰同志分别利用β函数及幂数指数函数来模拟直径分布均取得了良好结果。本文利用林业中常用的一元回归方法业讨论异龄混交林的数学模型,以根据不同的工作条件作直径分布数学模型的选择。
The diameter distribution of pure forests of the same age showed a normal distribution or approximately normal distribution; the diameter distribution of heterosis mixed forest or large area generally showed almost hyperbolic distribution of anti-tetraloid distribution, which is widely known to foresters law. In recent years, Comrade Guan Wenzheng and Chen Zhenjie achieved good results by simulating the diameter distribution using the β function and exponential function respectively. In this paper, we use the common regression method of forestry industry to discuss the mathematical model of mixed plantation to make the choice of mathematical model of diameter distribution according to different working conditions.