| Autor: |
Cuong, L. V., Sang, T. V., Bolanle-Ojo, O. T., Bao, T. Q., Ngoan, T. T., Tuan, N. T., Hung, N. X., Long, L. V., Duong, D. T. T., Phu, N. V. |
| Předmět: |
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| Zdroj: |
Malaysian Journal of Soil Science; Dec2022, Vol. 26, p120-132, 13p |
| Abstrakt: |
To better understand soil nitrogen (N) sequestration by Acacia mangium Willd. in the plantations of the Southeastern region of Vietnam, a study was conducted to examine soil N content and storage in three different-aged A. mangium stands (4, 7 and 11 years old). Soil samples were collected at different depths from 0-50 cm. Field measurements were taken based on established national standard methods. We used the modified Kjeldahl method to determine soil total N concentration. Soil total N concentration at the various soil depths for each plantation decreased significantly with increasing depth, but increased significantly with plantation age. Soil total N stocks at the topsoil (0-50 cm) increased from 6.13 Mg. N. ha-1 in 4-year-old stands to 9.71 Mg. N. ha-1 in 11-year-old stands. Soil total N storage showed obvious topsoil aggregation with more than 60% of soil total N storage in the 0-30 cm depth for each stand. Hence, protection of total N stocks present in the topsoil of planted forests is very critical in the context of N sequestration. Furthermore, stand characteristic parameters (i.e., stand age, plant biomass, stand density, tree height and diameter at breast height, and canopy closure) significantly affected soil total N storage. The findings from this study indicate that taking stand age into consideration is greatly beneficial for forest soil N storage assessment and highlights the potential of A. mangium for N sequestration in plantation ecosystems. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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