| Summary: | Through this study, we established equations for estimating the standing tree carbon stock based on 24 tree species in multiple size classes in a case study at the Ngao Demonstration Forest (NDF) in northern Thailand. Four hundred thirty-nine wood samples from trees in mixed deciduous forest (MDF), dry dipterocarp forest (DDF), and dry evergreen forest (DEF) were collected using non-destructive methods to estimate aboveground carbon equations through statistical regression. The equations were established based on four criteria: (1) the coefficient of determination (R<sup>2</sup>), (2) standard error of estimate (SE), (3) F-value, and (4) significant value (<i>p</i>-value, α ≤ 0.05). The aboveground carbon stock (C) equations for standing trees in the MDF was C = 0.0199DBH<sup>2.1887</sup>H<sup>0.5825</sup>, for DDF was C = 0.0145DBH<sup>2.1435</sup>H<sup>0.748</sup>, for DEF was C = 0.0167DBH<sup>2.1423</sup>H<sup>0.7070</sup>, and the general equation for all species/wood density groups was C = 0.017543DBH<sup>2.1625</sup>H<sup>0.6614</sup>, where DBH is tree diameter at breast height, and H is tree total height. The aboveground carbon stock in the DDF, MDF, and DEF was 142, 53.02, and 12 tons/ha, respectively, and the estimated aboveground carbon stock in the Mae Huad sector at the NDF was 61 tons/ha.
|
|---|