A field method to assist selection of wheat varieties best suited to local soils may be the best strategy for mitigating waterlogging risk.

Sam North1, Carlos Ballester Lurbe2, James Brinkhoff2 and Alex Schulz1

1 NSW DPI, 449 Charlotte St, Deniliquin, NSW, 2710, website, Email samuel.north@dpi.nsw.gov.au, 
2 Centre for Regional and Rural Futures (CeRRF), Deakin University, Research Station Rd, Hanwood, NSW, 2680

Abstract:

Waterlogging is a major constraint to wheat yields in Australia. There is genetic diversity for waterlogging tolerance in wheat and there is a need to improve wheat yields on waterlogging prone soils through identification of more tolerant varieties. This study aimed to (i) assess the usefulness of redox potential (Eh) and canopy temperature (Tc) to explain wheat responses to waterlogging and; (ii) determine whether there is sufficient variability in current, commercially available wheat varieties to justify trials on local, waterlogging prone soils. Ten varieties were examined, with control and waterlogged treatments imposed at two sites. Waterlogging was imposed at anthesis, with water ponded on plots for 14 days. Measurement of Eh allowed differences in the responses of varieties to waterlogging at the two sites to be understood. Canopy temperature was also useful at showing differences between the varieties. There were clear differences in the responses of currently recommended wheat varieties to both soil type and to waterlogging. Local trials on waterlogging prone soils are needed to allow wheat growers to select the best varieties for their soils.

 

Host

The Australian Society of Agronomy is the professional body for agronomists in Australia. It has approximately 500 active members drawn from government, universities, research organisations and the private sector.

Photo Credits

David Marland Photography david_marland@hotmail.com Graham Centre for Agricultural Innovation, Charles Sturt University

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