Developing One-variable Individual Tree Biomass Models based on Wood Density for 34 Tree Species in China

Abstract

摘要: 森林是陆地上最大的碳库，其固碳能力的评估必须以生物量模型作为计量基础。基于 2012 年研究提出的 通用性生物量模型 M = 0． 3pD 7 /3 ，利用公开发表的各树种木材基本密度数据，建立了我国全部 34 个树种 (组) 的一元地上生物量模型，再利用全国森林生物量调查建模项目的实测数据，对其中 14 个树种 (组) 的地上生物 量模型进行了验证; 还分别针叶树和阔叶树 2 个树种组建立了相容性地下生物量模型和根茎比模型，并检验了 其预估效果。结果表明: 所建一元立木生物量模型对各个树种 (组) 地上生物量和地下生物量估计的相对误差 绝对值平均数均未超过其相应的允许误差 10% 和 15% ，可用于宏观层面的森林生物量估计，是近年颁布实施的 生物量模型系列行业标准的重要补充。 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 broad-leaved， 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