Reserves Estimating Carbon in Forest City District Village Bongohulawa Gorontalo
Journal Title: Invention Journal of Research Technology in Engineering & Management - Year 2018, Vol 2, Issue 8
Abstract
The estimation of Carbon stock and carbon sink in the City Forest of Bongohulawa village, Regency of Gorontalo (Guided by. The research was aimed to know volume growth of trees planted in the Village District Bongohulawa Gorontalo, to calculate the volume and content of carbon biomass in the city forest and green line (left-right path) and average carbon sequestration/tree/species. Research was conducted in village of Bongohulawa during 4 (fourth) month; started from March until June 2011. The execution of data collecting [of] was performed within this research area-location through observation and measurement of trees and forest stand. For green line research area 100% inventory was upllied and for City Forest line plot sampling was implemented. For city forest sample plots measurement was conducted in 10 sample units (each unit sampling of 0.25 ha). Tree diameter, tree hight (total and commercial hight) and crown diameter of all tree species within research line (green line) and research plots (city forest) was measured. Based on the research data and its calculation, the results show that: Casuarina junghuhiana can store more carbon than other tree species. From the inventory conducted in 3 km of green line along the road (6 meters width observations) of the village Bongohulawa, 366 trees (consist of 7 tree species) were measured. Those tree species namely Casuarina junghuiana 102 trees, sandalwood 46 trees, mango 7 trees, jackfruit 6 trees, Albizia 1 tree, mahogany 202 trees, headland 2 trees. Crown cover of those tree species is 3032.54 m2 . The result of calculation also indicated that Casuarina has higher carbon stock than other tree species that is 33.56 tons (equal with 52% of total crbon stock). Further calculation indicated that during the period of 19 years (since 1992) Casuarina can strocked carbon average of 1.77 tons/year. The average diameter increment of individual Casuarina tree species is about 1.72 cm/year. Furthermore, for Swietenia magrophilla King, with an average diameter increment of 1.40 cm/year, the leaves of this tree species can absorbed carbon of 18.1233 tons within green line of both sides of the road. For research plots within City Forest which located in the valey the results of the research show that the crown cover of 124 trees is about 1,359.67 m2, then carbon absorbtion is about 0.15 ton/tree or about 7.8 kg/tree/year. Within the research area of City Forest (located both in the valey and hill) totally there are 1,353 trees (consist of 13 tree species) and carbon absorption of the canopy is about 25.521 tons. Further calculation results also indicated that carbon absorption of small trees ( poles) is about 25.521 tons and for sapling is about 78.163 tons or 39,0815 tons/ha then fionally for mature trees is about 39.813 tons or 15,925 tons/ha
Authors and Affiliations
Daud Sandalayuk
Keywords
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