关键词: 地上生物量, 地下生物量, 木材密度, 根茎比

Abstract:

Forest is the largest carbon bank on land,and assessment of forest carbon sequestration must be based on biomass models.Based on the general biomass model M=0.3pD ^7/3 presented in 2012,one variable individual tree aboveground biomass models for all 34 tree species or groups in China were established using the data of wood basic density of all tree species published;and based on the mensuration data of the National Biomass Modeling Program in Continuous Forest Inventory(NBMP-CFI),the aboveground biomass models of 14 tree species(groups)were validated.Additionally,compatible below ground biomass models and root-to-shoot ratio models for two species groups,coniferous and broadleaved,were developed and evaluated.The results showed that average absolute relative errors of above and below-ground biomass estimates from one-variable biomass models developed in this study were less than the allowances 10% and 15%,respectively.The developed biomass models here could be applied to estimate forest biomass on macro levels,and would be an important supplement to the ministerial standards on biomass models which were promulgated and implemented in the past years.

Key words: aboveground biomass, belowground biomass, wood density, root-to-shoot ratio