油松人工林单木胸径生长过程模拟及检验

Dynamic Prediction and Verification of Individual Tree DBH Growth Process of the Pinus tabulae formis Plantantion

本文采用Logistic、Richards、Gomertz、Weibull、JohnsonSchumacher、Bertalanffy 6种理论生长方程对油松人工林单木胸径生长过程进行了模拟,从中筛选出拟合精度最佳的生长方程。研究结果显示:6种理论生长方程模拟油松单木胸径生长过程的决定系数R^2值均为0.7以上,达极显著水平,其中Richards方程预测精度最高;使用未进行建模的10株油松解析木对所构建的预测方程进行T检验,发现模型预测值与实测值之间无显著差异(p=0.1699>0.05)。所构建的预测方程可以预测油松人工林单木胸径生长过程,为油松人工林科学经营提供重要参考。

Dynamic prediction and verification of individual tree DBH growth process of the Pinus tabulaeforrnis plantantion were investigated by applying the theories of Logistic, Richards, Gompertz, Weibull, Johnson-Schumacher, and Bertalanffy. Optimal equations of simulation were selected. The results showed that the values of R2 in six theories were all 0.7, belonging most significant level, in which equations from Richards theory exhibited the most accurate result. No significant differences （p= 0. 169 9〉0.05） were found between predicted and measured values after applying the data sampled from the plantation that were not used to build models, indicating the practical values of the equations established in the management of artifical P. tabulaef ormi plantations.