The Relative Importance of Stand and Soil Properties Parameters on Soil Organic Matter Content of Acacia Hybrid Forests in the South Central Coast Region of Vietnam

Cuong, L.V. and Quy, N.V. and Hung, B.M. and Chau, M.H. and Doan, P.V.T.D. (2024) The Relative Importance of Stand and Soil Properties Parameters on Soil Organic Matter Content of Acacia Hybrid Forests in the South Central Coast Region of Vietnam. Malaysian Journal of Soil Science (MJSS) (Malaysia), 28. pp. 134-146. ISSN 1394-7990

Soil organic matter (SOM) represents a crucial C reservoir for climate regulation and a necessary constituent for forest soil functions. Unfortunately, less attention was accorded to the alters in SOM under various stand ages and the relative significance of biotic (i.e., stand properties) and abiotic (i.e., soil physico-chemical features) parameters in the adjustment of SOM in forests. In the study, we investigated the SOM in soil layers of Acacia hybrid plantations over different age classes (young stand of 3 years, middle-aged stand of 6 years, and near-mature stand of 9 years) in the South Central Coast region of Vietnam. Characterizing forest stand features and other soil physico-chemical characteristics were also measured. The effects of the primary influence variables on SOM were explored. The results demonstrated that with the increase in stand age, the concentrations of SOM tended to increase. SOM content declined substantially with the increase in soil depth, showing a topsoil enrichment phenomenon. Stand structural and soil physico-chemical features significantly differed between the three plantation stand ages. The combined effect of stand and soil parameters explained 93% of alterations in SOM. Regarding the pure impacts, soil factors explained the most portion of shifts in SOM (41.10%). These findings illustrate the critical role of biotic and abiotic parameters in assessing the SOM concentration in A. hybrid forests across different stand ages. The results of the current study provide a deeper insight into the response of SOM to stand age and finally offer a reliable scientific basis for designing optimal organic matter management practices for the sustainable development of A. hybrid forests.

Full text available from: Official URL: https://www.msss.com.my/mjss/Full%20Text/vol28/V28...

Abstract

Soil organic matter (SOM) represents a crucial C reservoir for climate regulation and a necessary constituent for forest soil functions. Unfortunately, less attention was accorded to the alters in SOM under various stand ages and the relative significance of biotic (i.e., stand properties) and abiotic (i.e., soil physico-chemical features) parameters in the adjustment of SOM in forests. In the study, we investigated the SOM in soil layers of Acacia hybrid plantations over different age classes (young stand of 3 years, middle-aged stand of 6 years, and near-mature stand of 9 years) in the South Central Coast region of Vietnam. Characterizing forest stand features and other soil physico-chemical characteristics were also measured. The effects of the primary influence variables on SOM were explored. The results demonstrated that with the increase in stand age, the concentrations of SOM tended to increase. SOM content declined substantially with the increase in soil depth, showing a topsoil enrichment phenomenon. Stand structural and soil physico-chemical features significantly differed between the three plantation stand ages. The combined effect of stand and soil parameters explained 93% of alterations in SOM. Regarding the pure impacts, soil factors explained the most portion of shifts in SOM (41.10%). These findings illustrate the critical role of biotic and abiotic parameters in assessing the SOM concentration in A. hybrid forests across different stand ages. The results of the current study provide a deeper insight into the response of SOM to stand age and finally offer a reliable scientific basis for designing optimal organic matter management practices for the sustainable development of A. hybrid forests.

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Item Type:	Article
AGROVOC Term:	soil organic matter
AGROVOC Term:	forest soils
AGROVOC Term:	forest management
AGROVOC Term:	soil sampling
AGROVOC Term:	carbon sequestration
AGROVOC Term:	soil fertility
Geographical Term:	Vietnam
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	22 May 2025 03:40
Last Modified:	22 May 2025 03:40
URI:	http://webagris.upm.edu.my/id/eprint/2816

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