期刊论文

中文

中南林业科技大学学报

1673-923X

2022

42

5

44-53

10.14067/j.cnki.1673-923x.2022.05.005

国家林业公益性行业科研专项“太行山西侧生态公益林提质增效关键技术研究”（201404417）；

本校为第一机构

【目的】为准确预估单木冠长,在再参数化的基础上构建基于混合效应的单木冠长模型,为华北落叶松区域经营、生产、科研提供理论依据及模型参考。【方法】以山西省五台山和庞泉沟地区116块样地2 745株华北落叶松次生林为例,建立单木冠长模型,从9个冠长-胸径候选模型中选取最优基础模型;除胸径外还考虑其他6个林木、林分因子对冠长的影响,通过逐步回归分析选择影响最为显著的因子构建冠长再参数化模型;最后引入样地随机效应,构建含混合效应的华北落叶松次生林单木冠长模型,选用3个常用异方差消除函数中最优者消除混合效应模型的异方差性。【结果】9个候选模型尤以Logistic形式的冠长-胸径模型拟合精...

【Objective】In this work,to accurately estimate the crown length of individual trees,the individual tree crown length model based on mixed-effect was constructed based on Re-parameterization,to provide a theoretical basis and model reference for the regional management,production and scientific research of Larix principis-rupprechtii.【Method】Taking 2745 Larix principisrupprechtii secondary forest trees in the 116 sample plots in Wutai Mountain and the Pangquangou area of Shanxi Province as the samples,the individual tree crown length model w...