Estimating aboveground biomass and carbon stock of planted Eucalyptus grandis in Toba Plateau, North Sumatra
Onrizal, Cecep Kusmana, Mashhor Mansor, Rudi Hartono
Estimating carbon sequestration in planted forests is very important activity within global warming issues. The main objective of our research was to develop allometric equation of aboveground biomass and carbon stock of planted Eucalyptus grandis forests in Toba plateau, North Sumatra using destructive method. The 18 tress of E. grandis was cutting to formulate allometric equation both aboveground biomass and carbon stock of 1-to-9 year old E. grandis trees. The variables observe include biomass and carbon content for individual stem, branch, and leaf for aboveground biomass and carbon stock. Organic carbon content from each part of E. grandis trees was analyzed by CN analyzer in laboratory. The result showed that allometric equation both biomass and carbon stock was in good relation with stem diameter (D) as log-linear equation. Carbon content average of E. grandis tree part was 44.92%. The best allometric equations for aboveground biomass and carbon stock of planted E. grandis were WAG = 0.0678D2.5794 (R2 98.8%) and CAG = 0.0266D2.6470 (R2 98.0%), respectively.