杉木林自疏过程密度调节规律的研究

DENSITY REGULATION LAW FOR CUNNINGHAMIA LANCEOLATA FOREST DURING SELF-THINNING

摘要:

提出了森林自然稀疏过程中密度调节规律新模型,应用收缩扩张算法以山杨、云南松等树种森林自疏过程中密度资料对新模型进行了验证。验证结果表明:所提出的森林自疏规律模型能很好拟合实际的观测资料,具有良好的使用价值；所采用的非线性方程最优拟合方法是科学的,从而丰富了该领域的研究方法。将提出的森林自然稀疏过程密度调节规律模型应用于杉木林自疏过程密度变化规律研究,效果很理想,可为杉木林经营管理提供参考。

Abstract:

Based on Zhang's model for Populus tremula var. davidiana and Pinus yunnanensis forests, a mathematical model of forest population density regulation during self-thinning is presented. The new model was tested using the Algorithms of Contraction-Expansion. The results showed that the new model could fit the observed data very Well. Algorithm of Contraction-Expansion used to optimize nonlinear equation is rational, which will enrich the research method in this field. The new model in the study of density regulation 1aw in Cunninghamia lanceotata forest is sarisfactory and can provide usefu1 information for the management of Cunninghamia lanceolata forest．