BIOMASS AND CARBON SEQUESTRATION OF ACACIA MANGIUM WILLD PLANTATIONS AT DIFFERENT AGES IN THAI NGUYEN PROVINCE, VIETNAM

Abstract

This study aimed to investigate the amount of carbon or carbon dioxide in Acacia mangium Willd plantations of different ages (2, 3, 4, 5, 6, 7 years old) in Thai Nguyen province, Vietnam. In this research, the total carbon sequestration of a plantation consists of the carbon stored in above ground tree biomass was assessed. A total of 54 sample trees were harvested and dissected into their components included boles, branches and leaves to weigh biomass and converted into carbon stock of Acacia mangium Willd. The result shows that the values of green biomass changed by years in the study site, which ranges from 27.08kg/tree to 127.7kg/tree and 60.12 tons to 156.42 tons/ha from 2-year to 7-year respectively. The dry biomass ranged from 29 to 79 ton/ha of observed age plantations. This study also found that the major contributor to total biomass and carbon stocks in Acacia mangium Willd plantation up to 7 years old was boles and followed by branches and leaves.