林分直径结构新模型研究

通过理论分析与实际验证提出１种新的林分直径分布预测方法Ｇ－Ｌ－ＰＲＭ。其基本思想是：将林分中大小不同的林木分布规律视为生物种群的分布问题，用著名的种群动态模型－Ｇ－Ｌｏｇｉｓｔｉｃ方程来表示林分直径分布；采用３点回收、差分还原的途径实现林分结构的预测。Ｇ－Ｌ－ＰＲＭ在闽北杉木人工林中得以验证，其预估林直径分布的合格率达９１．３％。

A Study on New Model of Stand Diameter Structure

Conbined theoretical analysis with actual tests,a new prediction method (G L PRM) for stand diameter distribution is presented.The method takes the distributed law of different trees in stand as a question of biological interpopulation distribution,and stand diameter distribution is expressed by means of the famous Generalization Logistic equation interpopulation dynamic model.The prediction can be made by the three point recovery and difference restoration.The results proved to be satisfactory after the examination in Cunninghamia lanceolata forest in the north of Fujian province.