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Improvement of the quality and precision of biomass and carbon equations: case study of mixed-deciduous degraded forest of Thailand |
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| รหัสดีโอไอ | |
| Creator | Patthanan Porkar, Wimon Sonchaem, Raywadee Roachanakanan, Rungjarat Hutacharoen |
| Title | Improvement of the quality and precision of biomass and carbon equations: case study of mixed-deciduous degraded forest of Thailand |
| Publisher | คณะสิ่งแวดล้อมและทรัพยากรศาสตร์ |
| Publication Year | 2554 |
| Journal Title | Environment and Natural Resources Journal |
| Journal Vol. | 9 |
| Journal No. | 2 |
| Page no. | 39 |
| Keyword | Mixed-deciduous secondary forest, Aboveground biomass, Specific-species regressionmodel,Biomass equation,Carbon sequestration. |
| ISSN | 1686-5469 |
| Abstract | Environmental pressures brought about by climate change have increased the urgency for biomass assessment to measure the potential of forests to be carbon sinks and carbon sources. The researcher suggests that improving the quality and precision of models used for measuring carbon stock in forests is thus important. This study aims to investigate the relationships between independent factors, such as dry weight biomass (B), and dependent factors, such as diameter at breast height (D), height (H), and wood specific gravity (?), to formulate biomass equations for four common tree species: Sterculia pexa; Millettia brandisiana; Grewia eriocarpa; and Bridelia ovata. Regression models, each with different independent variables (D, ?D, D2H, and ?D2H), were studied. The results showed a strong correlation between B, D, and H, but not ?. However, ? showed a significant variation between the four species which indicated that proper species identification is required for accurate modelling. The best regression models for estimating biomass had two forms: ln(B) = c + ?ln(D) and ln(B) = c + ?ln(?D2H). The dry weight of individual trees using the regression model with ?D2H had an average estimated error of 0.09 |
