Biomass Partitioning and Accumulation in Tectona grandis (Teak) at Young Stage

Forest biomass is considered to have a large potential for temporary and long-term carbonstorage as biomass. Enhancement of biomass increase via forest plantation establishment canbe considered as an effective method of mitigation of atmospheric carbon dioxide. However,due to the difficulty of measuring the below ground biomass accumulation, most of the treeand forest related biomass studies have been conducted on the above ground components ofthe trees. Therefore the present study was conducted to identify the biomass accumulationover the age and its partition in above and below ground segments of young teak trees bydestructive sampling.Teak trees of 55, 67, 79, 91 and 103 months growing in a single plantation in Puttlam wasselected for this reason. Three trees of each age were randomly selected and carefullyuprooted with the minimum damage to the roots. Then each tree was separated into mainstem, primary, secondary and tertiary branches and roots and the weights were measured.Representative samples of each segment of the tree were oven dried at 72° C for three days.Then the biomass of each segment was calculated.The average total tree biomass increased from 28.430 to 79.760 kg from 55 to 103 months.Comparatively, the highest biomass was recorded in the main stem (63.5%) followed byprimary branches (15.7%). The third highest biomass was recorded from the roots (11.7%)and the lowest biomass was recorded in tertiary branches (3.6%). A strong exponentialrelationship was observed between the tree age and whole tree biomass increase with the R2of 97.7%. It further revealed that the biomass increase of teak is rising with a rapid rate evenat the age of 10 years.Keywords: Tree biomass, Biomass partition, Tea