Abstract
Forests have ecological functions that play a role in absorbing carbon dioxide. This study aims to predict the above-ground biomass and carbon stocks. This research has been carried out in February - March 2016 at Sigogor Mountain Nature Reserve, Ponorogo, East Java, Indonesia (07°48’-07°50’ SL dan 111°36’-111°38’ EL) with an area of 190.5 ha. Tree biomass calculation analysis was done at Soil Laboratory of University of Muhammadiyah Malang. Biomass calculation used is allometric method. The results showed that total biomass stocks at tree level > 30 cm diameter was 0.21 ton / ha and tree level of 5 - 30 cm diameter was 0.02 ton/ha, while the biomass of lower plant was 5.88 ton / ha and for total litter yield of 8.47 ton/ha. Total biomass stocks on above-ground of the Sigogor Mountain Nature Reserve with an area of 190.5 ha is 1,438.78 tons. Trees of > 30 cm in diameter with the most biomass are found in Kemadu (Laportea sinuata Bl.), Dali (Radermachera gigantea), Marasawa (Engelhardis spicata), Pasang (Quercus sondaica) and Wesen (Dodoneca viscusa). The prediction of carbon stock in Sigogor Mountain Nature Reserve area is 426.05 tons and able to absorb carbon dioxide 1,601.93 tons.
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