| 刘鹏程,李敏敏,刘 娟,周 丹,施德山,李迎美.基于地径的云杉胸径与材积预测模型的构建研究[J].林业调查规划,2025,50(2):9-15 |
| 基于地径的云杉胸径与材积预测模型的构建研究 |
| Construction of Prediction Model for Diameter at Breast Height andVolume of Picea Based on Ground Diameter |
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| DOI： |
| 中文关键词: 材积预测模型 地径一元材积表 胸径—地径回归模型 联立方程组 云杉 |
| 英文关键词: volume prediction model ground univariate diameter volume table DBH-ground diameter
regression model simultaneous equations Picea |
| 基金项目:云南省科技厅科技计划项目“云南省桤木等5 个主要树种的林分碳计量技术研究”(林草联合专项)(202404CB090005);云南省
科技厅2023 年第二批科技成果转化专项资金(530000231100001753720). |
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| 中文摘要: |
| 分析采集于云南省丽江、香格里拉和德钦县(市) 的150 株云杉样木数据,采用平均断面积区
分求积法计算样木材积,使用DPS 软件的最小二乘法建立云杉胸径一元材积模型、地径一元材积
模型和地径一元胸径模型,采用误差变量联立方程组方法建立一元回归材积模型。结果表明,云杉
地径与胸径密切相关,其回归模型的确定系数R2为0.99;地径一元材积模型的预估精度(R2=
0.76)明显低于胸径一元材积模型(R2=0.91),采用误差变量联立方程组方法建立的云杉地径—
胸径回归材积模型精度(R2=0.92)较直接建立的地径—材积模型高。 |
| 英文摘要: |
| Based on the analysis of data collected from 150 Picea sample trees in Lijiang, Shangri-La,
and Deqen of Yunnan Province, this study calculated the wood volume using the average cross-sectional
area measurement method. The least squares method in DPS software was employed to establish a univariate
volume model based on diameter at breast height (DBH), a univariate volume model based on ground
diameter, and a univariate DBH model based on ground diameter. Additionally, a univariate regression
volume model was established using the error-in-variables simultaneous equations method. The results
showed that DBH was closely related to ground diameter, with a coefficient of determination (R2) of 0.99
for the regression model. The prediction accuracy of the univariate volume model based on ground diameter (R2=0.76) was significantly lower than that of the univariate volume model based on DBH (R2=
0.91). The accuracy of the ground diameter-DBH regression volume model established using the errorin-
variables simultaneous equations method (R2=0.92) was higher than that of the directly established
ground volume-height model. |
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