Allometric equations for estimating aboveground biomass of broad-leaved forests saplings and shrubs in subtropical China
[Objective]Accurately estimating the biomass of seedlings, saplings and shrubs is essential for forest ecosys-tem management.[Method]A total of 39 woody species with 746 individuals in the Jiulian Mountain Nature Reserve loca-ted in southeast China were destructively sampled. All species were categorized as high trees, small trees and shrubs, based on their life form. In addition to component-specific biomass, the ground diameter (d), stem height (h) and bas-ic wood density (ρ) were measured, and regressive models were established with d2 , ρd2 , d2 h and ρd2 h as predicting variables, respectively. Optimum models were chosen based on the determination coefficient R2 and standard error of es-timate.[Result]The basic wood densities of the sampled species were in the range of 0.459-0.784 g/ cm3 . Sixteen opti-mum models were chosen among 64 candidate models. For small trees and shrubs, equations for foliage and branches with a single predicting variable d, showed higher R2 values, while the fitness of the stemand total-aboveground biomass was closer for equations with d, h, and ρ as the independent factors for small trees and shrubs than for the other catego-ry.[Conclusion]The models established in this study are expected to provide reliable accuracy for estimating the above ground biomass of understory woody species in the same vegetation zone.
国家科技期刊平台
NSTL
万方数据
维普
