摘要
根据5种不同造林密度试验的树干解析资料,利用威布尔模型对杉木人工林胸径、树高和材积的生长过程进行了模拟,并采用改进单纯形法对模型中的参数进行了拟合.结果 表明,威布尔生长模型可以有效模拟杉木人工林的胸径、树高和材积随林龄增长的生长过程,但胸径、树高和材积与密度的关系并不完全一致,同时进一步证实了改进单纯形法对非线性模型模拟的有效性.
Based on the data of 5 different densities of Cunninghamia laceolata plantation, Weibull growth model was used to analyze growing laws of mean DBH, mean tree height and mean stem volume, and the parameters in the model were calculated by using Modified Simplex Methods（MSM）. The results showed that： Weibull growth model can estimate growing process of Cunninghamia lanceolata contained DBH, tree height and volume with different densities, but it is not always identical relative between DBH, tree height and volume and density; and the validity of MSM in estimating the parameters of nonlinear model was approved again.
出处
《北华大学学报（自然科学版）》
CAS
2007年第3期276-280,共5页
Journal of Beihua University（Natural Science）
基金
福建省重大自然科学基金项目(2001F007)
关键词
杉木
生长过程
威布尔模型
改进单纯形法
Cunninghamia lanceolata
Process of growth
Weibull model
Modified simplex methods
