Abstract: To improve the accuracy of carbon sink accounting for bamboo forests in Fujian Province,this study systematically measured and validated the regional applicability of the aboveground biomass general models from existing methodologies,and carried out localized calibration of key parameters,using 138 Phyllostachys edulis culms collected from nine bamboo-producing areas in the province.The results showed that the general aboveground biomass models provided in the 《Methodology for Greenhouse Gas Voluntary Emission Reduction Projects:Afforestation Carbon Sinks(CCER-14-001-V01)》 have limited applicability in Fujian.The univariate model based on diameter at breast height(Model 1)exhibited a regional underestimation(mean bias:-4.72%),while the bivariate model based on DBH and height(Model 2)completely failed in prediction due to parameter structural imbalance(R² = 0.138).The study determined the aboveground biomass allocation ratios of P.edulis in Fujian(culm:84.12%,branch:12.11%,leaf:3.77%),and developed a high-precision univariate allometric growth model for P.edulis in Fujian(W_above=0.1275×D^2.2219,R²=0.9613,P<0.01).Combined with published data,the mean carbon fraction(CF)of the aboveground part of P.edulis was determined to be 0.5071.The above findings constitute a set of localized parameters and a modeling scheme for carbon sink accounting that are tailored to the management characteristics of bamboo forests in Fujian Province,providing a scientific basis for accurate monitoring and trading of regional bamboo forest carbon sinks.