Above Ground Biomass (AGB) pada Tegakan Sawit (Elaeis guineensis Jacq.) di Kabupaten Langkat

Abstract

KEPLER DOPLER PURBA : The Estimate Carbon Stocks Above Ground Biomass (AGB) on Palm (Elaeis guineensis Jacq.) Stands in Langkat District. Guided by RAHMAWATY and RISWAN. Global warming is caused by the increasing of carbon consentration in the atmosphere beyond its natural consentration. One of the efforts to reduce greenhouse gases is by presenting plants or plants which absorb carbon. The information about the carbon content of the vegetation or forest stands can be obtained by guessing vegetation biomass. The technology of remote sensing and Geographic Information Systems are considered adequate to give the required information quickly and completely with an adequate level of accuracy and relatively low cost. Langkat District has 113725.241 ha wide of a total area of graden area. Carbon stocks in above-ground on Elaeis guineensis Jacq stand. In area of palm plantation of Langkat District has 68.84t/ha of the highest carbon value which is quite good. The model was developed using statistical approach based on the relation of between digital numbers and vegetation index derived from remot sensing and carbon content which is measured of plot sample. The result of the research showed the best model which was obtained from Landsat ETM 5 is Y = 38.39 + 26.24 * NDVI with determination coefficient 49.14% . Thus the index of vegetation NDVI is the best index used to estimate carbon in Langkat, North Sumatra.