ESTIMATES OF BIOMASS AND CARBON SEQUESTRATION OF ACACIA HYBRID PLANTATION IN DONG NAI BIOSPHERE RESERVE

Abstract

This paper presents findings on estimating biomass and carbon sequestration of acacia hybrid plantation in Dong Nai Biosphere Reserve. Data were collected in 45 sample plots with the plot area of 500 m² (20 ´ 25 m) representing soil classes I, II, III and ages of 3 to 7 year old plantations. Two sample trees were selected in each sample plot for destrcution to measure fresh biomass. Dry biomass was analyzed in laboratory and the relationship between dry biomass and forest inventory factors to estimate dry-mass and carbon stock of individual trees and plantation stand. Findings indicated that fresh biomass, dry biomass and carbon storage fluctuate in different ages and soil classes. At the same age of plantation, biomass and carbon storage tends to gradually decrease according to soil classes (from I to III) and while biomass and carbon stock increases greatly as the increased plantation ages from 3 to 7 years in the same soil class. Another resutlt shows that there is a close correlation between total tree dry biomass and D (diameter at breast height) and H (total tree height).