Amelioration of alkaline phytotoxicity by lowering soil pH

D. J Brautigan; P Rengasamy; David Chittleborough

doi:10.1071/CP13435

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Amelioration of alkaline phytotoxicity by lowering soil pH

Journal article

Peer reviewed

Amelioration of alkaline phytotoxicity by lowering soil pH

D. J Brautigan, P Rengasamy and David Chittleborough

Crop and Pasture Science, Vol.65(12), pp.1278-1287

2014

DOI: https://doi.org/10.1071/CP13435

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Abstract

alkaline soils

phytotoxicity

remediation

Highly alkaline soils (pH >9) may adversely affect agricultural crop productivity. At pH >9.2, aluminium (Al) phytotoxicity may further retard plant development. Most alkaline soils have little alkaline buffering capacity, making it feasible to use acid to lower soil pH to <9.2. Many methods of lowering soil pH have been trialled; however, little research has been done on their relative effectiveness and longevity. Methods trialled in this study as means of lowering soil pH were chemical additives (gypsum), organic additives (glucose, molasses, horse manure, green manure, humus) and leguminous plants. Gypsum was also used in conjunction with plants to determine any synergistic effects of combining treatments. All ameliorants trialled except humus and horse manure proved effective at lowering soil pH to <9.2. The reduction achieved with biological amendments was temporary, with pH returning to pre-amendment levels over the course of the study. Gypsum was most effective amendment for lowering soil pH and sustaining the lowered pH level. The use of plants to lower soil pH, in conjunction with gypsum to sustain the lowered pH, may be an effective and economic method of remediating Al phytotoxicity in alkaline soils.

Details

Title: Amelioration of alkaline phytotoxicity by lowering soil pH
Authors: D. J Brautigan (Author) - University of Adelaide
P Rengasamy (Author) - University of Adelaide
David Chittleborough (Author) - University of Adelaide
Publication details: Crop and Pasture Science, Vol.65(12), pp.1278-1287
Publisher: C S I R O Publishing
DOI: 10.1071/CP13435
ISSN: 1836-5795
Organisation Unit: School of Science and Engineering - Legacy; Sustainability Research Centre; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99472608202621
Output Type: Journal article

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