Biomass, carbon stock and allocation characteristics in Mesua ferrea plantation

Based on the quadrat survey and actual biomass measurement in a 28-year-old Mesua ferrea plantation in Experimental Center of Tropical Forestry located at Pingxiang City of Guangxi Zhuang Autonomous Region,the carbon stock and its allocation characteristics were studied by the allometric method. The results showed that carbon contents in different organs of M. ferrea ranged between 452.4 and 524.5 g/kg, following the order of leafstembranchrootbark. Soil carbon content in the surface layer was the highest, and it reduced with the increase of soil depth. The biomass and carbon stock of tree layer in M. ferrea plantation were 165.8 and 79.3 t/hm2, and the allocation of biomass ranked as stembranchrootleafbark, the same as the allocation of the carbon stock in the tree layer. The biomass of M. ferrea plantation ecosystem was 173.5 t/hm2 and carbon stock 203.1 t/hm2, the biomass in the plantation was mainly distributed in the tree layer (95.6%), and the allocation of carbon stock in different components was soil layer (59.3%)tree layer (39.0%)ground layer (1.7%). The carbon content aboveground was greater than that underground in shrub layer and herb layer; however, the biomass and carbon stock aboveground were less than those underground.