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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 Corkrey
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.

Funding

Australian Centre for International Agricultural Research

History

Publication title

Proceedings of the 5th Joint Australian and New Zealand Soil Science Conference

Editors

LL Burkitt and LA Sparrow

Pagination

594-597

ISBN

978-0-646-59142-1

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Australian Society of Soil Science Incorporated

Place of publication

Hobart,Tasmania

Event title

5th Joint Australian and New Zealand Soil Science Conference

Event Venue

Hobart, Tasmania

Date of Event (Start Date)

2012-12-02

Date of Event (End Date)

2012-12-07

Rights statement

Copyright 2012 Australian Society of Soil Science Incorporated

Repository Status

  • Restricted

Socio-economic Objectives

Rehabilitation or conservation of terrestrial environments

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