Estimating Biomass and Carbon Mass Potency of Wood Plantation ofAcacia crassicarpa Growing on Peat Land Site (A Case Study on Fiber Wood Plantation Area at Pelalawan, Riau Province

The role of forests as carbon sink and carbon store is undoubtedly important to reduce the carbon arnount in the earth atmosphere therelly preventinggreenhouse(CHCJ effect that can induce the global 111armi11g.A11Jong the various typesofforest, peat s111a1npforest serves as the largestcarbon store. A researchhas been carried out at thefiber wood plantationforest comprisingtnost!JAcacia crassicarpa species that gre111 on apeat land, at the Pelalaiuansector, Ria« Province. The research was to obtain allometricequatios that relatedthe growthparametersof A. crassicarpatrees (i.e. tree diameter (DJ and height either a total (Htot) or branchfre« (Hbc)) to theirgro111thproduas i.e.biomass (W) and carbon mass (CJ.It 111as found that the best fitted and most representative allometric equations uere consemtive!J W =0.398918d'°'1Hbl'161(for estimating biomasspotency) and c = 0. 131 v'•2" Htol"' (for carbon 1!JaSS potency).Furtbremore, samplesA. Crassicarpatreefrom different stand ages (2,3,4, and 5years old) cooeringpartiadartree portions (i.e main stems, branches, twigs, leaves, and roots) were testedfar moisture contents,spesfi«gravity/ density, ash content, volatilematter andfixed carbon. The allometnc equations obtained wereused to measureand estimatethe biomass and carbon masspotencies ofA. crassicarpa treestands at theiragegroup, i.e. 2,3,4 and 5yearsold. Using thoseallomemc equations, the estimatesof biomass (W'.) of A.Crassicarpafor age 2, 3, 4 and 5years old are 44.98 tons/ ha, 70.35 Ions/ha,134.05 tons/ ha,and 234.78 to11s/year. Thepotency of carbon mass are 12.09 tons/ ha, 36.23 tons/ ha, 76.09 tons/ ha and 133.10 tons/ ha.for stand age 2,3,4 and5 respective!J.