A comparison of three biomass estimation methods: a case study of Pinus tabulaeformis forests in China

摘要

Power model, linear model and hyperbolic model were commonly used to estimate forest biomass via stand volume, however the relative accuracy is unclear for Pinus tabulaeformis forests in China. In order to compare the accuracies of these models, data from 130 Pinus tabulaeformis forest stands were compiled from published literatures. Data of 100 stands were randomly selected to establish regression equations, the other 30 Data were used to compare the accuracies of equations either established in this study or in previous studies. The results show that biomass of Pinus tabulaeformis forests could be well estimated by power model and linear model, while hyperbolic model is likely to result in enormous overestimation or underestimation. The mean relative errors of the power model and linear model established in this study are -0.3% and 1.8% respectively. In comparison with models established by previous studies, these two models have better prediction accuracies.