林分直径结构模型的研究

Study on stand Diameter Structure Model

通过理论分析与实际验证提出了一种新的林分直径分布预测方法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──Ｌｏ－ｇｉｓｔｉｃ方程来表示林分直径分布；采用两点回收、差分还原的途径实现林分结构的预测。Ｌ－ＰＲＭ在杉木人工林中得以验证，其预估林分直径分布的合格率达８８％以上。

Combined theoretical analysis with actual tests,a new prediction method(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 di-ameter distribution is expressed by means of the famous logistic equation──interpopulation dynamic model.The prediction can be made by the two-point recovery and difference restoration.The results proved to be satisfactory after the examination in Cunninghamia lanceolata forest.