On-farm assessment of sub-soil salinity and sodicity constraints to barley production in southern Australia

Paper


Tavakkoli, Ehsan, Jones, Ben, Coventry, Stewart, Rengasamy, Pichu and McDonald, Glenn. 2010. "On-farm assessment of sub-soil salinity and sodicity constraints to barley production in southern Australia." Dove, Hugh and Culvenor, Richard (ed.) 15th Australian Agronomy Conference: Food Security from Sustainable Agriculture (ASA 2010). Lincoln, New Zealand 15 - 18 Nov 2010 Gosford, Australia.
Paper/Presentation Title

On-farm assessment of sub-soil salinity and sodicity constraints to barley production in southern Australia

Presentation TypePaper
AuthorsTavakkoli, Ehsan (Author), Jones, Ben (Author), Coventry, Stewart (Author), Rengasamy, Pichu (Author) and McDonald, Glenn (Author)
EditorsDove, Hugh and Culvenor, Richard
Journal or Proceedings TitleProceedings of the 15th Australian Agronomy Conference: Food Security from Sustainable Agriculture (ASA 2010)
Number of Pages4
Year2010
Place of PublicationGosford, Australia
Web Address (URL) of Paperhttp://www.regional.org.au/au/asa/2010/crop-production/subsoil/7155_tavakkoli.htm
Conference/Event15th Australian Agronomy Conference: Food Security from Sustainable Agriculture (ASA 2010)
Event Details
15th Australian Agronomy Conference: Food Security from Sustainable Agriculture (ASA 2010)
Event Date
15 to end of 18 Nov 2010
Event Location
Lincoln, New Zealand
Abstract

Multiple factors contributing to subsoil constraints include salinity, sodicity, and high concentrations of chloride which are present in many rain-fed farming soils of Southern Australia. Identifying genotypes adapted to these adverse subsoil conditions and/or able to exploit subsoil water may be an option to maintain productivity of these soils. Field trials were carried out to evaluate the relative importance of high soil solution concentration of Na+ and Cl- ions on yield reduction of barley in 4 sites over 3 years in north-west Victoria and South Australia. All soils had high concentrations of exchangeable Na+ and Cl- in the subsoil and the variation in these levels were correlated with the spatial variation in yield. Grain yield was also greater in genotypes with the capacity to exclude Na+ and Cl- from their leaves. Measurement of ion concentrations from the upper two leaves of the main stem at Zadoks 65 were highly correlated with yield among 10 adapted varieties of barley and may be effective as screening criteria compared with those from the lower two leaves. The maintenance of low Cl- and Na+ concentrations in the upper two leaves offered the best guide to salt tolerance under both conditions. Potassium concentration was a poor criterion compared with the selectivity of K+ over Na+.

Keywordssalinity; barley; abiotic stress; subsoil constraint
ANZSRC Field of Research 2020370999. Physical geography and environmental geoscience not elsewhere classified
410601. Land capability and soil productivity
300404. Crop and pasture biochemistry and physiology
Public Notes

Copyright © 2010 Australian Society of Agronomy.
This publication may be of assistance but the publisher, editors and authors do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaim all liability for any error, loss or other consequence, which may arise from your relying on any information in this publication.

Byline AffiliationsUniversity of Adelaide
Mallee Focus, Australia
Institution of OriginUniversity of Southern Queensland
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