Student Research Reports

The objective of this research was to study the carbon sequestration of trees at Phakmai Wittayanukul School, Phakmai Subdistrict, Huai Thap Than District, Sisaket Province, by evaluating tree species, trunk size, and biomass weight. The methodology involved measuring the Diameter at Breast Height (DBH) and tree height, utilizing standard allometric equations to calculate biomass, and estimating carbon storage at 50% of the dry weight. The study specifically focused on analyzing the carbon absorption and storage capacities of two species, Albizia lebbeck (Siris tree) and Azadirachta indica (Neem tree), as well as their impacts on soil quality and the surrounding environment. The sample group included 5 trees with a DBH of 10–40 cm (2-3 trees per species). Soil samples were also collected around the tree bases to analyze nutrient content, with statistical analysis performed using mean, standard deviation, and Analysis of Variance (ANOVA, p<0.05). The results showed that carbon storage varied according to tree species and size, with larger trees possessing a higher capacity for carbon sequestration than smaller ones. Specifically, Albizia lebbeck had a significantly higher average carbon storage than Azadirachta indica; however, Azadirachta indica demonstrated slightly better effects on soil moisture and quality. These findings indicate that both species play vital roles in carbon sequestration and environmental restoration within the school. Albizia lebbeck is highly suitable for enhancing carbon storage in greenhouse gas reduction projects, while Azadirachta indica is ideal for improving soil quality and biodiversity. This data can be utilized to plan green space management and future environmental activities for Phak Mai Wittayanukul School.