Study On Larix Biomass Model And Biomass Estimation In Dongzhelenghe

Based on survey data about the biomass of Larix in Dongzhelenghe,the paper compared biomass models with independent variables were D²H,D and D²,and the consequences is that independent variable of D²H is better than others in biomass model of aboveground biomass and stems biomass,but in the model of crows biomass,branches biomass and leaves biomass, independent variable of D² is better.The paper estimates the parameters of allometric model,the stability of W=f(x)V in biomass nonlinear model is better than the stability of W=f(x);the models of biomass about aboveground,stem,crow,branche,leave are following:W_A=0.0454(D²H)^0.9322, W_S=0.0336(D²H)^0.9345,W_C=0.0414D^2.3376,W_B=0.0334D^2.3435,W_L=0.00792D^2.3244.By analyzed the survey date of 14 plots in Larix plantation,the relationship between stand biomass and stock volume are following:stem:y=0.4195x+17.9580,branch:y=0.1447x+3.1831, leave:y=0.0286x+1.3184,aboveground:y=0.6616x+22.9016,root:y=0.1397x+4.6899,total: y=0.8013x+27.5915.The mean carbon content rate(CCR) of stems,branch,leaf and root in tree layer stand are 0.4959,0.5074,0.5087,0.5287,and the total mean CCR is 0.5036,and the aboveground mean CCR is 0.4983.According to the data,the paper estimated the biomass and carbon storage about layer stand of Larix plantation forest in Dongzhelenghe.Total biomass of layer in Larix forest is estimated as40.64×10³t,and average biomass is 96.54 t/hm²;Total carbon storage of layer in Larix forest is 20.48×10³t,and carbon density is 48.65 t/hm².