滇西北高山松根径与胸径相关性模型比选研究

解开宏; 宋永俊; 牛红玉; 冷鸿天

文章摘要

解开宏,宋永俊,牛红玉,冷鸿天.滇西北高山松根径与胸径相关性模型比选研究[J].林业调查规划,2024,49(5):1-6

滇西北高山松根径与胸径相关性模型比选研究

Comparison and Selection of Correlation Models between Root Diameterand Breast Height Diameter of Pinus densata in Northwest Yunnan

DOI：

中文关键词: 高山松根径胸径相关性模型比选滇西北

英文关键词: Pinus densata root diameter breast height diameter comparison and selection of correlation models northwest Yunnan

基金项目:云南省林业和草原局 “ 云南省“十四五”林业数表适用性检验与修编财政资金支持项目”;云南省科技厅2023 年第二批科技成果转化专项资金(530000231100001753720).

作者	单位
解开宏	云南省林业调查规划院营林分院,云南昆明 650021
宋永俊	云南省林业调查规划院,云南昆明 650051
牛红玉	云南省林业调查规划院,云南昆明 650051
冷鸿天	云南省林业调查规划院,云南昆明 650051

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中文摘要:

在滇西北调查高山松样木总株数862 株,有效样木824 株,系统抽取建模样木618 株,检验样木206 株。选用10 种一元线性或非线性回归方程,拟合各胸径D 与根径DR 模型参数,并进行了适用性检验。结果表明,模型D =-2.710 599+0.938 673DR-0.000 911DR²,离差平方和(SSR) 值相对较小、总相对误差(RS) 为0、相关系(R²)0.987、预估精99.44%,残差图以横轴为中心分布最为均匀随机,模型参数变动系数最大值为32.3%,说明模型稳定。检验样本实测值和估计值没有显著差异,该模型最优。

英文摘要:

A total of 862 Pinus densata sample trees were surveyed in northwest Yunnan, including 824 effective sample trees. 618 modeling sample trees were systematically extracted, and 206 inspection sample trees were tested. 10 univariate linear or nonlinear regression equations were selected to fit the model parameters of breast height diameter D and root diameter DR, and their applicability was tested. The results showed that the model D=-2.710 599+0.938 673DR-0.000 911DR² had a relatively small sum of squared deviations (SSR) value, a total relative error (RS) of 0, a correlation coefficient (R²) of 0. 987, an estimation accuracy of 99.44%, the residual plot was most uniformly and randomly distributed around the horizontal axis, and the maximum coefficient of variation of model parameters was 32.3%, indicating the stability of the model. There was no significant difference between the measured and estimated values of the test sample, indicating that the model was optimal.

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