广西桉树材积模型研建和应用研究  

Constructing and Applying Eucalyptus Volume Model in Guangxi Province

作　　者：张先来 徐庆玲 梁民 谭昌师 王科 ZHANG Xianlai;XU Qingling;LIANG Min;TAN Changshi;WANG Ke(Guangxi Forestry Inventory and Planning Institute,Nanning 530011,Guangxi,China)

机构地区：[1]广西壮族自治区林业勘测设计院,广西南宁530011

出　　处：《贵州林业科技》2024年第2期12-18,共7页Guizhou Forestry Science and Technology

基　　金：广西桉树优良无性系林木计量标准研究(桂林科字〔2016〕24号)。

摘　　要：为探讨广西桉树伐区作业设计、森林资源规划设计调查和激光雷达估算森林蓄积量等问题,在广西6个区域276块标准地中选取539株桉树样木实测树高、胸径和冠幅等因子,采用非线性模型回归分析方法分别建立一元胸径材积模型(V=0.00017D^(2.55156))、二元胸径树高材积模型(V=0.00004354D^(1.71874)H^(1.19727))和二元冠幅树高材积模型(V=0.0000405602 Cw^(0.86134)H^(2.44421))。对3个立木材积模型进行不同区域、不同胸径、树高段以及独立样本检验,各模型总相对误差(TRE)、平均系统误差(ASE)绝对值均小于5%,预估精度(P)95.0%以上,除一元胸径材积模型外,平均百分标准误差(MPSE)均小于10%。结果表明:一元胸径材积模型可快速估算立木蓄积,工作量小、使用简单,但模型不够稳定;二元胸径树高材积模型精度高、稳定,多用于标准木或标准地林木蓄积调查,也是相关形高、树高曲线等研究的基础性模型,但工作量大、成本高,用于森林资源大范围调查存在较大困难;二元冠幅树高材积模型精度优于一元胸径材积模型,劣于二元胸径树高材积模型,但能满足相关精度要求,用于基于机载激光雷达新技术获取冠幅、树高,对森林资源进行区域性调查和监测,具有明显优势。3个立木材积模型各有优缺点,适用范围不一样,可结合实际调查应用于广西桉树不同类型生产经营活动的蓄积量调查。This study aims to investigate the operation design of eucalyptus felling area in Guangxi Province,China.The forest volume was also estimated by LIDAR,particularly for the decision-making on the forest resource planning.539 eucalyptus sample trees were firstly selected from 276 standard plots in six regions.Tree height,DBH and crown width were then used to establish a one-dimensional DBH volume model(V=0.00017 D^(2.55156)),a binary DBH-tree height volume model(V=0.00004354D^(1.71874)H^(1.19727))and a binary crown width-tree height volume model by nonlinear model regression method(V=0.0000405602 Cw^(0.86134)H^(2.44421)).Three stumpage volume models were tested in the different areas,DBH,segments of tree height and independent samples.The total relative error(TRE)and average systematic error(ASE)absolute value of each model were less than 5%,and the estimated precision was more than 95.0%.The mean percent standard error(MPSE)was less than 10%,except for the one-dimensional DBH volume model.The results show that the three stumpage volume models were varied greatly in their application ranges.Among them,the one-dimensional DBH volume model was accurately and rapidly estimated the accumulation of standing trees,with the small workload and simple use,but the model was unstable enough;The two-dimensional DBH-tree height volume model with the high accuracy and stability was mostly used for the standard wood or standard ground forest tree accumulation,particularly for the shape and tree height curve,but the large workload and the high cost were unsuitable for the large-scale investigation of forest resources;The accuracy of the binary crown width-tree height volume model was better than that of the one-dimensional DBH one,although inferior to the binary DBH-tree height one.Therefore,the binary crown width-tree height volume model can fully meet the accuracy requirements to obtain the crown width,tree height regional survey and monitoring of forest resources using airborne LIDAR.Therefore,three models can be applied into t

关 键 词：材积模型 桉树 森林蓄积量 

分 类 号：S758.62[农业科学—森林经理学]