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 and Volume of Picea Based on Ground Diameter

作　　者：刘鹏程[1] 李敏敏 刘娟[1] 周丹 施德山 李迎美 LIU Pengcheng;LI Minmin;LIU Juan;ZHOU Dan;SHI Deshan;LI Yingmei(Yunnan Institute of Forest Inventory and Planning,Kunming 650051,China;Pingbian County Forestry and Grassland Bureau,Pingbian,Yunnan 661299,China)

机构地区：[1]云南省林业调查规划院,云南昆明650051 [2]屏边县林业和草原局,云南屏边661299

出　　处：《林业调查规划》2025年第2期9-15,共7页Forest Inventory and Planning

基　　金：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).

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R^(2)为0.99;地径一元材积模型的预估精度(R^(2)=0.76)明显低于胸径一元材积模型(R^(2)=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(R^(2)=0.92)较直接建立的地径—材积模型高。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(R^(2))of 0.99 for the regression model.The prediction accuracy of the univariate volume model based on ground diameter(R^(2)=0.76)was significantly lower than that of the univariate volume model based on DBH(R^(2)=0.91).The accuracy of the ground diameter-DBH regression volume model established using the error-in-variables simultaneous equations method(R^(2)=0.92)was higher than that of the directly established ground volume-height model.

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 

分 类 号：S791.27[农业科学—林木遗传育种] S758.3[农业科学—林学]