Tree stands clustering and carbon stock assessment of deciduous dipterocarp forest at Kasetsart University Chalermphrakiat Sakonnakhon Province Campus, Sakonnakhon Province

Abstract

This study aimed to classify groups of tree stands in deciduous dipterocarp forest after fire protection, and evaluate the carbon stock based on above-ground biomass (AGB) of each stand at Kasetsart University Chalermphrakiat Sakonnakhon Province campus. Systematic sampling plots, 40 m x 40 m, established in four line and each contained of four plots with 10 m adjacent for each line and plot, total 16 plots. All tree with diameter based on height (DBH) larger than ? 4.5 cm were measured and identified during May 2017. The result showed 65 species in 52 genera and 29 families were recorded. The cluster analysis by PC-ORD version 6 exhibited four groups of tree stands. The intermediate similarity was found among stand based on existed of dominance species, particular Shorea siamensis, Shorea obtusa and Xylia xylocarpa var. Xylocarpa. However, the codominance species led them had significant different, particular Cratoxylum formosum, Peltophorum dasyrrhachis and Mitragyna rotundifolia. These species were found and abundance after fire. Total AGB and carbon stork were observed four groups of 118.11 ? 9.29 ton/ha-1 and 55.51 ? 4.37 ton C/ha-1 respectively. The stand of Aporosa villosa is the highest AGB and carbon stock, 131.35 ? 29.69 ton/ha-1 and 61.73 ? 13.94 ton C/ha-1, respectively. Indicating, fire protection showed high effected on species composition and also AGB in this forest.