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林业资源管理 ›› 2023, Vol. 0 ›› Issue (4): 36-42.doi: 10.13466/j.cnki.lyzygl.2023.04.005

• 科学研究 • 上一篇    下一篇

引入林分优势高和气候因子的杉木和桉树树高-胸径模型研建

杜志1(), 陈振雄1(), 李锐1, 罗崇彬2, 杨国锦2, 曾伟生3   

  1. 1.国家林业和草原局中南调查规划院,长沙 410014
    2.四会市自然保护地管理中心,广东 肇庆 526000
    3.国家林业和草原局林草调查规划院,北京 100714
  • 收稿日期:2023-05-08 修回日期:2023-05-25 出版日期:2023-08-28 发布日期:2023-10-16
  • 通讯作者: 陈振雄(1979-),男,湖南长沙人,教授级高级工程师,硕士,主要研究方向:森林资源监测与评价。Email:zhenxiongchen@qq.com
  • 作者简介:杜志(1986-),男,湖南长沙人,高级工程师,硕士,主要研究方向:森林资源监测与评价。Email:674862391@qq.com
  • 基金资助:
    国家自然科学基金面上项目(31971578)

Development of Tree Height-DBH Model for Cunninghamia lanceolata and Eucalyptus Robusta Based on Stand Dominant Height and Climatic Factors

DU Zhi1(), CHEN Zhenxiong1(), Li Rui1, LUO Chongbin2, YANG Guojin2, ZENG Weisheng3   

  1. 1. Central South Academy of Inventory and Planning of NFGA,Changsha 410014,China
    2. Sihui Nature Reserve Management Center,Zhaoqing,Guangdong 526000,China
    3. Academy of Forest Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714,China
  • Received:2023-05-08 Revised:2023-05-25 Online:2023-08-28 Published:2023-10-16

摘要:

基于广西森林资源年度监测评价项目中25块杉木样地和25块桉树样地的每木胸径和树高实测数据,从7个传统树高-胸径曲线中筛选出拟合精度最优模型作为基础模型,引入林分优势高和气候因子构建广义非线性模型,通过10折交叉验证法进行检验,并对一元材积公式的估计误差进行评价。结果显示:1)各传统树高-胸径曲线模型中,Richards模型为杉木和桉树最优的基础模型;2)引入了林分优势高和气候因子的杉木和桉树树高-胸径广义非线性模型,拟合精度相对基础模型更高,杉木的R2,MPEMPSE的值分别为0.797 6,0.58%和13.91%,桉树的R2,MPEMPSE值分别为0.720 7,0.62%和11.58%;3)采用一元材积公式得到的杉木和桉树总体蓄积与实测蓄积相差较大,其中桉树相对误差为-13.51%,超过了林业行业标准要求范围,运用树高-胸径广义非线性模型和二元材积公式计算总体蓄积,与实测值相对误差不超过0.5%,构建的杉木和桉树树高-胸径广义非线性模型能运用于实践生产。

关键词: 优势高, 杉木, 桉树, 广义非线性, 树高-胸径模型

Abstract:

Based on the mensuration data of diameter at breast height(DBH)and tree height from 25 Plots of Cunninghamia lanceolata and 25 plots of Eucalyptus robusta in the annual monitoring and evaluation of national forest resources of Guangxi Zhuang Autonomous Region,the basic model with the highest simulation accuracy was selected from seven common tree height-DBH curve models,then stand dominant height and climate data were introduced to build generalized nonlinear models.The 10-fold cross-validation method was applied to test the models,and the estimation error of one-dimensional volume formula was evaluated.The results showed that:1)Among the traditional tree height-DBH curve models,Chapman-Richards model was the basic model with the highest accuracy;2)Compared with the basic model,the generalized nonlinear tree height-DBH model with stand dominant height and climate data had higher fitting accuracy.The determination coefficient(R2),mean prediction errors(MPE)and mean percent standard errors(MPSE)of Cunninghamia lanceolata model were 0.7976,0.58% and 13.91%,respectively,and those of Eucalyptus robusta model were 0.7207,0.62% and 11.58%,respectively;3)The volume calculated by the one-dimensional volume formula was quite different from the measured volume,especially the Eucalyptus robusta reach -13.51%,which exceeded the scope of forestry industry standards.It was worth noting that the relative error calculated by the binary volume formula and the generalized nonlinear tree height-DBH model is not above 0.5%.The generalized nonlinear tree height-DBH model of Cunninghamia lanceolata and Eucalyptus robusta can be well applied to practical production.

Key words: dominant height, Cunninghamia lanceolata, Eucalyptus robusta, generalized nonlinear model, tree height-DBH model

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