文献类型：期刊文献

中文题名：广东省樟树相容性生物量模型的构建

英文题名：Establishment and analysis of compatible biomass model for Cinnamomum camphora in Guangdong Province

作者：曹磊[1] 李海奎[1]

第一作者：曹磊

机构：[1]中国林业科学研究院资源信息研究所

年份：2018

卷号：38

期号：4

起止页码：458-465

中文期刊名：森林与环境学报

外文期刊名：Journal of Forest and Environment

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：广东省林业科技专项"广东主要碳汇造林树种生物量模型研建"(2015-02);广东省林业科技创新平台建设项目"广东省碳汇计量监测创新平台建设"(2016CXPT03)

语种：中文

中文关键词：广东省;樟树;生物量;独立模型;相容性模型

外文关键词：Guangdong Province;Cinnamomum camphora(L.)J.Presl;biomass;individual model;additive model

分类号：S757

摘要：单木生物量模型是林分生物量和碳储量估算的基础。利用广东省90株样木的生物量实测数据,采用非线性联合估计的方法,构建了樟树各组分与地上总量相兼容的生物量模型。以决定系数(R^2)、总相对误差(E_(TR)),平均相对误差(E_(MR))和平均预估误差(E_(MP))等指标检验模型的精度,并与独立模型相比较。同时,分径阶进行检验,并分析了樟树各组分占地上部分总生物量的比例。结果表明:地上部分生物量相容性模型预估精度达到90%以上,总相对误差和平均相对误差在3.0%以内,模型决定系数在0.90以上,预估效果较好;生物量相容性模型与独立模型相比,虽然总相对误差、平均预估误差和均方根误差(E_(RMS))较大,但平均相对误差较小,且模型保持了分量与总量较好的相容性,对于4 cm以下的小径阶立木来说,两种模型拟合效果均较差,但就2 cm小径阶而言,相容性模型较优于独立模型,而对于38 cm大径阶来说,独立模型略占优势;各组分中干材生物量比例最大,其次是树枝、干皮和树叶。各组分生物量占地上部分生物量比例随胸径增大变化趋势不同。应用非线性联合估计得到的广东省区域内相容性模型较好地预测了樟树单木生物量,且保持了各组分较好的相容性,模型的建立有助于广东省樟树生物量和碳储量的精准估算。
Single-tree biomass model is the basis of stand biomass and carbon storage.This paper used the joint nonlinear estimation to establish the compatible model with the measured datum of 90 trees of Cinnamomum camphora in Guangdong Province.The coefficient of determination(R 2),total relative error(E TR),mean percent deviation(E MR)and mean percent estimate error(E MP)were used to evaluate the model accuracy.The compatible model was also compared with the individual model.The model for classified diameter class and the proportion for each component were also analyzed.The results showed:the estimate accuracy of compatible model reached over 90%.E TR and E MR were below 3.0%while R 2 were more than 90.0%;compared with individual model,E TR,E MP and E RMS were slightly large while E MR was much smaller,but additive model maintained good compatibility between the total and components.For the small diameter below 4 cm,two models both performed poorly,however,compatible model performed better for the 2 cm diameter whereas individual model performed better for the 38 cm large diameter;the proportion of stem wood biomass accounted for the most of the aboveground and followed by branch,stem bark and foliage.With the increase of the diameter,the ratio of components showed different change.The compatible model established by the joint nonlinear estimation performed accurately and predicted well for single-tree and contributed to the accurate biomass estimation and carbon storage for C.camphora in Guangdong Province.