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Soil amelioration by Acacia hybrid: An assessment of soil condition for re-establishing native species in the tropics
conference contribution
posted on 2023-05-23, 06:50 authored by Dong, TL, Richard DoyleRichard Doyle, Christopher BeadleChristopher Beadle, Stephen CorkreyStephen CorkreyTropical 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.
Funding
Australian Centre for International Agricultural Research
History
Publication title
Proceedings of the 5th Joint Australian and New Zealand Soil Science ConferenceEditors
LL Burkitt and LA SparrowPagination
594-597ISBN
978-0-646-59142-1Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Australian Society of Soil Science IncorporatedPlace of publication
Hobart,TasmaniaEvent title
5th Joint Australian and New Zealand Soil Science ConferenceEvent Venue
Hobart, TasmaniaDate of Event (Start Date)
2012-12-02Date of Event (End Date)
2012-12-07Rights statement
Copyright 2012 Australian Society of Soil Science IncorporatedRepository Status
- Restricted