云南松林分直径结构的动态预测

A Dynamic Prediction of The Diameter Structure of Pinus yunnanensis Stands

本文根据云南松(Pinus yunnanensis Franch)固定标准地资料,把林分立木生长划分成4个生长级,将偏中指标和密度指数作为参数,建立了林分直径结构预测模型。用该模型对云南松林分直径结构进行模拟,检验表明模型具有较高的精度。

The study was conducted on the permanent sample plots of Pinus yunnanensis. According to the growth conditon of the trees, the individual trees were divided into 4 categories i. e. dying, stagnating, a diameter growth of 1 cm/year, and a diameter growth of 2 cm/year. The mean diameter deviation index and density index were used for modelling the diameter distribution. Simulation of the diameter distribution of P. yunnanensis were carried out by means of the model. The results indicate that the predicting model has a high accuracy. This study provides a new modelling technique in the fields of predicting diameter distribution.