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Root architecture of barley in duplex soils under irrigation


Matuszek, MR and Botwright Acuna, T and Parsons, D and Hardie, MA, Root architecture of barley in duplex soils under irrigation, Proceedings of the Rhizosphere 3 Conference, 25-30 September 2011, Perth, Western Australia (2011) [Conference Extract]


Aims and Background Despite texture contrast soils occupying a majority of Southern Australian agricultural regions, little is known about root growth under irrigation. This project assesses the interactions between soil moisture, soil strength and root architecture and its impact on barley yield and water-use efficiency. Methods Barley was grown under waterlogged, optimally irrigated and rainfed treatments on a duplex soil in Southern Tasmania. Following harvest for yield, 1m2 pits were excavated and root number, soil moisture and soil strength were measured on horizontal soil faces to a depth of 110 cm and analysed spatially. Results Soil excavation indicated that root depth and distribution was influenced by strategic irrigation. Spatial data demonstrated that increased soil moisture reduced penetration resistance of the clay subsoil, which allowed for greater root exploration throughout the soil profile. Data also suggests that roots density is greater within cracks and the surrounding soil matrix, which affects the efficiency of water uptake. Conclusion Strategic irrigation of barley was demonstrated to have a positive influence on yield, rooting depth and distribution in vertic, duplex soils. Improved understanding of root-soil interactions can be used more effective irrigation to increase yields and water-use efficiency of grain crops in these hydraulically complex soils.

Item Details

Item Type:Conference Extract
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Agronomy
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Barley
UTAS Author:Matuszek, MR (Mr Marek Matuszek)
UTAS Author:Botwright Acuna, T (Associate Professor Tina Acuna)
UTAS Author:Parsons, D (Dr David Parsons)
UTAS Author:Hardie, MA (Mr Marcus Hardie)
ID Code:73929
Year Published:2011
Deposited By:Agricultural Science
Deposited On:2011-10-29
Last Modified:2012-02-09

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