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黄土高原北部典型灌丛枝条生物量估算模型
杨宪龙1,2; 魏孝荣1,2; 邵明安2,3
2016
Source Publication应 用 生 态 学 报
Volume27Issue:10Pages:3164-3172
Abstract

于 2015 年 8 月末在陕西神木县六道沟小流域采集 200 个柠条和 210 个沙柳枝条,测
定枝条的基径(D)、长度(H)、含水量(W 0 )、鲜质量(W F )和干质量(W),选用指数函数和异速
生长方程建立了 4 种由枝条形态指标估算枝条生物量的简易模型,并对模型的拟合效果进行
验证. 结果表明: 对于柠条和沙柳灌丛,基于 D、H 二者组合变量(D 2 H)的异速生长方程是估
算枝条生物量的最优模型,该模型经线性转化后可以消除生物量数据的异方差性,且拟合效
果最优,决定系数(R 2 )最大,平均误差(ME)、平均绝对误差(MAE)、总相对误差(TRE)、平均
系统误差(MSE)和平均绝对百分误差(MPSE)整体上最小,基本满足生态学研究的精度要求.

Other Abstract

 A total of 200 stems of Caragana korshinskii and 210 stems of Salix psammophila were
collected in the late August of 2015 in the Liudaogou catchment of Shenmu County,Shaanxi Pro-
vince,China. Basal diameter (D),length (H),water content (W 0 ),fresh mass (W F ) and dry
mass (W) were measured for each stem of the two species. Exponential and allometric equations
were used to establish relationship models relating stem biomass to its morphological parameters. Al-
together four models were established for each species,and their accuracy of estimation was also
validated. The results showed that,the allometric model that used D 2 H as input variable was optimal
in estimating stem biomass for C. korshinskii and S. psammophila,after transformed into its linear
form. Meanwhile,the heteroscedasticity of the biomass data was greatly eliminated. This model had
a maximum value of coefficient of determination (R 2 ),and meanwhile minimum values of mean
error (ME),mean absolute error (MAE),total relative error (TRE),mean systematic error
(MSE),and mean absolute percentage error (MPSE),thus basically meeting the requirement of
the accuracy in ecological study.

Keyword灌木 基径 长度 生物量 估算模型
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8608
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院,陕西杨凌 712100
2.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100
3.中国科学院地理科学与资源研究所,北京 100101
Recommended Citation
GB/T 7714
杨宪龙,魏孝荣,邵明安. 黄土高原北部典型灌丛枝条生物量估算模型[J]. 应 用 生 态 学 报,2016,27(10):3164-3172.
APA 杨宪龙,魏孝荣,&邵明安.(2016).黄土高原北部典型灌丛枝条生物量估算模型.应 用 生 态 学 报,27(10),3164-3172.
MLA 杨宪龙,et al."黄土高原北部典型灌丛枝条生物量估算模型".应 用 生 态 学 报 27.10(2016):3164-3172.
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