编号
010034105
推送时间
20220502
研究领域
森林生态
年份
2022
类型
期刊
语种
英语
标题
Additive Root Biomass Equations for Betula platyphylla Suk. Plantations in Northeast China
来源期刊 forest
期
第341期
发表时间
20220424
关键词
Betula platyphylla;
root biomass;
additive equation;
disaggregated model;
摘要
Most of the forest biomass models that have been developed so far focus on the study of the aboveground biomass of forest trees and the prediction of belowground biomass remains obviously insufficient. Moreover, most of the existing studies on the estimation of the belowground biomass of trees have considered roots as a whole, ignoring the differences in composition and function of roots within different diameter classes. In this study, we measured the root biomass of birch plantation forests in northeastern China using extensive destructive sampling, in which we divided the root system into three parts: coarse, medium, and fine roots. We selected the best model base form from three common allometric biomass equations and determined the most appropriate error structure for the two sets of models using likelihood comparisons. The additive and disaggregated models were fitted using maximum likelihood with open-source software. We also added the site factor as a dummy variable into the two models. Finally, the competency of the two models was tested using ten-fold cross-validation. The results showed that both models could provide relatively accurate estimates of birch root biomass but that the disaggregated model performed slightly better than the additive model. View Full-Text
服务人员
王璐
服务院士
蒋有绪
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