期刊论文

Growth and yield models of Phoebe zhennan secondary stand in Hunan province

中文

中南林业科技大学学报

1673-923X

2021

41

1

92-99+108

10.14067/j.cnki.1673-923x.2021.01.009

国家林业公益性行业科研专项（201504301）；

本校为第一机构

【目的】建立湖南省楠木次生林林分断面积与蓄积相容性生长收获预估模型,为林分的生长预测和经营决策提供理论依据。【方法】以湖南省1989-2014年6期一类清查样地中的楠木次生林为研究对象,建立其林分断面积和蓄积生长的联立方程组,在此基础上,加入样地效应,构建基于混合效应的联立方程系统。【结果】基础模型包括3个含林分变量的内生变量,模型M_1、G_2、M_2拟合的确定系数(R~2)分别为0.860、0.907、0.778;相比基础模型,混合效应模型不仅在R~2上有所提高(0.960,0.913,0.915),其平均误差(Bias)和均方根误差(RMSE)也有明显的降低;对比残差分布图,发现混合效应模型拥有分布范围更小、分布更均匀的残...

【Objective】Establishing a compatible growth and yield prediction model for the basal area and volume of Phoebe zhennan secondary forest in Hunan province, to provide theoretical basis for its growth prediction and management decision-making.【Method】A simultaneous equation group of stand basal area and volume growth was established for Phoebe zhennan secondary forest by the data of national forest inventory in Hunan province from 1989 to 2014. The simultaneous equation system based on mixed effect was constructed by adding stand effect.【Res...