J. For. Sci., 2023, 69(1):21-32 | DOI: 10.17221/46/2022-JFS

Acacia canopy structure and carbon stock in Ba Vi, VietnamOriginal Paper

Bui Manh Hung ORCID...1, Nguyen Thi Bich Phuong2, Nguyen Van Quy3, Nguyen Van Hop3, Le Van Cuong4, Yusif Habib5
1 Department of Forest Inventory and Planning, Faculty of Forestry, Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam
2 Department of Soil Science, Faculty of Forestry, Vietnam National University of Forestry, Xuan Mai, Chuong My, Hanoi, Vietnam
3 Faculty of Natural Resources Management, Vietnam National University of Forestry - Second Campus, Dong Nai, Vietnam
4 Faculty of Forestry, Vietnam National University of Forestry - Second Campus, Dong Nai, Vietnam
5 Department of Agriculture and Environment Operational Research, AgroEco Farm Solutions Ltd., Accra, Ghana

Forest structure is a key component of its management and assessment in every forest ecosystem. In the study, 23 plots were established to obtain data on the acacia forest community based on tree size. Results from the study indicated that the acacia community could be broadly divided into two groups based on tree-size variables. The diameter and height frequency distributions of Group 1 were right-skewed, while those of Group 2 were more complicated. In both groups, there were positive correlations between tree-size variables, nonetheless the relationship between diameter at breast height and total height was best described using the cubic equation. Further, the Weibull and Sinh-Arcsinh (SHASH) best simulated the diameter and height frequency distribution. High-quality trees were found in a large diameter (> 30 cm) and height groups (> 22 m). In contrast, low-quality plants often concentrated on the smallest sizes. Therefore, trees with a diameter of 2–10 cm and a height lower than 8 m should receive attention to tend. Carbon stock in the two groups was 61.48 Mg·ha–1 and 64.21 Mg·ha–1, respectively. Tending solutions and measurements should be carried out regularly to promptly propose silvicultural measures and improve forest quality in future.

Keywords: Acacia mangium; distribution modelling; regression; tree quality

Received: April 15, 2022; Accepted: December 20, 2022; Prepublished online: January 23, 2023; Published: January 25, 2023  Show citation

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Hung BM, Thi Bich Phuong N, Van Quy N, Van Hop N, Cuong LV, Habib Y. Acacia canopy structure and carbon stock in Ba Vi, Vietnam. J. For. Sci. 2023;69(1):21-32. doi: 10.17221/46/2022-JFS.
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