Estimation of carbon sequestration rates and carbon densities of fast-growing tree plantations in Mindanao, Philippines
2020
Lantican, N.L.M. | Sy, M.U.
The study formulated accurate and reliable estimations of carbon sequestration rates and carbon densities of fast growing tree species in Mindanao. Species used include, bagras (Eucalyptus deglupta Blume) falcata (Paraserianthes falcataria (L.) Nielsen), mahogany (Swietenia macrophylla King), mangium Willd.) and yemane (Gmelina arborea Roxb.). Two hundred fourteen permanent sampling plots (PSPs) were established in private and government tree plantations aged 1, 4 and 7 years old across the 5 regions in Mindanao. The carbon (C) sequestration rates, the carbon densities, and their carbon dioxide (CO2) equivalent were determined using available allometric equations for the 5 tree species. Results showed that falcata had the highest predicted mean tree carbon sequestration rate of 15.339 kg/tree/yr and mean carbon dioxide equivalent of 56.293 kg/tree/yr from age 1 to 9 years. Mangium followed with 10.326 kg/C/tree/yr and 37.897 kg CO2/tree/yr. For bagras, 5.700 kg C/tree/yr equal to 17.756g CO2/tree/yr. On the other hand, a mahogany tree in a plantation that grows up to 8 years has a rate of 4.152 kg C/tree/yr equivalent to 15.237 kg CO2/tree/yr. Yemane, for its part, had a rate of 4.221 kgC/tree/yr equivalent to 15.6 kg CO2/tree/yr. The mean carbon density of the established plantations of 5 species in Mindanao had an overall carbon density of 7.364 tons/ha/year translating to 27.027 tons/ha/year of carbon dioxide. It is suggested that similar research be conducted on Philippine native trees and agroforesty species that are cognizant for their carbon sequestration potentials in mitigating climate change.
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