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Soil amelioration by Acacia hybrid: An assessment of soil condition for re-establishing native species in the tropics


Dong, TL and Doyle, R and Beadle, C and Corkrey, R, Soil amelioration by Acacia hybrid: An assessment of soil condition for re-establishing native species in the tropics, Proceedings of the 5th Joint Australian and New Zealand Soil Science Conference, 2-7 December 2012, Hobart, Tasmania, pp. 594-597. ISBN 978-0-646-59142-1 (2012) [Refereed Conference Paper]

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Copyright 2012 Australian Society of Soil Science Incorporated

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Tropical acacias are used for reforestation and recovery of degraded lands. This study aimed to evaluate the potential of Acacia hybrid (A. mangium x A. auriculiformis) to improve the physical and chemical properties of degraded soils. The experiment was carried out in second- or later-rotation Acacia hybrid plantations in Central Vietnam. A total of 109 soil samples was collected from the 0 20 cm topsoil of 30 plantations representative of five ages (0.5, 1.5, 2.5, 3.5 and 4.5-5.5 year-old) in six locations, and in nearby fallow land at each location. Acacia plantations significantly enhanced (P<0.05) total organic carbon (TOC), total nitrogen (TN), exchangeable calcium (Ex-Ca), magnesium (Ex-Mg), sodium (Ex-Na), electronic conductivity (EC) and bulk density (BD) when compared to fallow land. However, Acacia plantations increased soil acidity. Within the 5.5-year-old rotations examined, most soil properties were not significantly changed with increasing plantation age (P>0.05). However, the trends showed many nutrient properties declined during the first 2 or 3 years after establishment. After 4 years, TOC recovered to initial levels, though base cations remained lower. Soil properties were strongly related to initial soil and site factors such as clay content, gravel volume, slope angle and elevation.

Item Details

Item Type:Refereed Conference Paper
Keywords:Acacia hybrid, soil amelioration, site management, nurse crop
Research Division:Environmental Sciences
Research Group:Soil sciences
Research Field:Land capability and soil productivity
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Rehabilitation or conservation of terrestrial environments
UTAS Author:Dong, TL (Mr Dong Tran)
UTAS Author:Doyle, R (Associate Professor Richard Doyle)
UTAS Author:Beadle, C (Dr Christopher Beadle)
UTAS Author:Corkrey, R (Dr Ross Corkrey)
ID Code:78987
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2012-08-12
Last Modified:2017-10-31
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