Value-taking for vegetation carbon content rate based on the estimation of shrubbery carbon storage

The carbon content of three shrubs organs were measured in the eastern Inner Mongolia, in order to discuss the problems of the carbon content rate. Results showed that: 1) The biomass of shrub leaf, branch and root accounted for 10% to 20%, 40% to 60% and 30% to 40%, respectively, which showed that branch biomass accounted for half, the root biomass accounted for about a third of the total biomass. 2)The range of carbon content rate of leaf, twigs, roots of natural Prunus sibirica, artificial P. sibirica,artificial Caragana korshinskii and Ostryopsis decne were 0.428 7 to 0.456 7 g C·g-1, 0.445 9 to 0.462 8 g C·g-1, 0.397 3 to 0.431 3 g C·g-1, respectively .The carbon content of the root have a significant difference with the ground organs carbon, the carbon content rate variance between leaves and branches varied with the tree species . 3) When the carbon content rate values of ground parts and root parts of natural P. sibirica, artificial P. sibirica, artificial C. korshinskii, O. decne were 0.45 and 0.42, respectively, the levels of ground carbon density were 1.370 7, 1.167 7, 198.873 and 2.157 3 t·hm-2, carbon density of roots were 0.941 6, 0.401 5, 100.908 8 and 0.721 1 t·hm-2, respectively. The relative errors was within 6% compared with the carbon density calculated by measured carbon content rate of the ground and the root system.