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- Title
黄土高原北部典型灌丛枝条生物量估算模型.
- Authors
杨宪龙; 魏孝荣; 邵明安
- 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-ince, China. Basal diameter (D), length (H), water content (W0), fresh mass (WF) 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. Altogether four models were established for each species, and their accuracy of estimation was also validated. The results showed that, the allometric model that used D2H 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 (R²), 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.
- Publication
Yingyong Shengtai Xuebao, 2016, Vol 27, Issue 10, p3164
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201610.009