重庆市石宝镇马尾松单木生长模型研究

为了更加科学地保护和利用马尾松森林资源并为其可持续经营提供参考依据,利用多模型选优法对重庆市忠县石宝镇马尾松的单木胸径生长模型进行了探讨与分析,结果表明：对竞争优势木和竞争劣势木的拟合效果最好的均是Richards函数,其次是Schumacher函数,而Gauss函数和Logistic函数的拟合效果较差.考虑到模型运算的简便性和结构的清晰性,结合研究区马尾松胸径生长量的预测情况,选取了模型参数相对较少的Schumacher 函数作为描述重庆市忠县石宝镇马尾松生长过程的最佳模型.

A Study of Individual Tree Growth Model of Pinus massoniana in Shibao Town, Chongqing City

In order to develop and use Pinus massoniana better and provide reference basis for its opera- tion and management,the muhi-model selection were used to analyze and discuss the individual tree di- ameter growth progress of Pin~ massoniana Lamb in Shibao town, Chongqing City. Results showed that whether it was a dominant tree or oppressed tree, Richards function was the best to fit the diameter of the growth process of P. massoniana, better than Schumacher function, while Gauss function was the worst. However, the parameters of the Richards function were too much, and the amount of diameter growth of P. massoniana estimated by Richards function did not meet the actual growth conditions, therefore, Schuma-cher function was the bestmodel which could be used to describe the diameter growth process of Pinus massoniana Lamb in Shibao town, Chongqing Province.