Pendugaan Potensi Kandungan Karbon Pada Tegakan

Abstract

Climate change constitutes a global phenomenon which is triggered by human activities, particularly those which use fossil fuel (BBF) and convert land uses. Such phenomenon had been discussed by various parties, and the effects of this phenomenon are very significant on the life of organisms, if there is no any prompt action of prevention. One the of the most effective technique for reducing green house gas emission is utilizing the natural feature of tree as CO2 absorber. The choice of sengon (Paraserianthes falcataria L Nielsen) in this research was because the sengon trees occcur in nearly all areas of people forest (forest owned by people or private owned forest) and could grow in nearly all types of soil. The objective of this research was learning the content of carbon (C) and estimating the carbon potency in sengon stand at various parts of the tree in people forest. Selection of sample trees in each diameter class was conducted by purposive sampling, starting from diameter class 5-10 cm to those of 50 cm upward. Carbon estimation was conducted in tree parts, namely roots, stump, stem, branch, stem after the first branch, twigs, and leaves. Afterwards, laboratory test was conducted to determine the carbon content in each part of the tree. From the results, selection of the best equation was conducted by using regression analysis based on statistics values and test of differences. Results show that there were different pattern of biomass growth between tree parts in line with the increase of diameter class, followed by increase of carbon contents of tree parts in each diameter class. Potency of carbon content of sengon stand in people forest was 77.445 ton C/ha. The greatest potency of tree carbon content in sengon stand was in diameter class of 50 cm upward, namely 34.379 ton C/ha whereas that of the lowest in diameter class 5-10 cm, namely 0.078 ton C/ha. Percentage of carbon content in various tree parts of sengon was the highest in stem part, namely 47.299 %; whereas that of the lowest was in leaves, namely 36.119 %. Selected model for carbon estimation based on root diameter for diameter < 5 cm was C = 10.9 D1.94; those for root diameter > 5 cm was C = 43,65 D4,84 H-2,53, for stump was C = 30.2 D1.93 H1.07, for stem was C = 24.5 D1.95 H1.19, for branch was C = 43,65 D2,11 H0,94, for stem after the first branch was C = 38,9 D2,16 H1,13 , for twig was C = 1.445,4 D2,82, for leaves was C = - 0,446 + D10, and for the whole part of tree was C = 69.1 D2.14 H0.783.