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Water-use efficiency of wheat in Tasmania

Citation

Acuna, TL and Lisson, S and Matuszek, M and Fish, RE and Johnson, PG and Dean, GJ, Water-use efficiency of wheat in Tasmania, FACT SHEET Tasmanian Institute of Agriculture, The project was funded by GRDC (Project UT00016), TIA, UTAS and CSIRO, Hobart, Tasmania (2013) [Government or Industry Research]

Abstract

Emerging developments in Tasmanian grain cropping such as the expansion of low pressure overhead irrigators and increased access to low-cost, plentiful irrigation sources in some areas will have a strong influence on WUE. Conventional estimates of WUE that are based on grain yield per the combined amount of rainfall plus irrigation do not account for stored soil moisture, drainage or runoff events that can be frequent in high rainfall environments. As a result, WUE may be over-estimated. An alternative approach is to estimate WUE as grain yield per the combined amount of surface evaporation, transpiration, drainage and runoff. Direct measurement of these different components to quantify ‘actual’ WUE is difficult and desktop modelling is used instead. This approach can distinguish between ‘attainable’ WUE, which is limited by crop management e.g. nitrogen fertiliser, and ‘potential’ WUE, which is determined by climate and is free of nutrient and biological constraints.

Item Details

Item Type:Government or Industry Research
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agronomy
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Wheat
Author:Acuna, TL (Associate Professor Tina Acuna)
Author:Lisson, S (Dr Shaun Lisson)
Author:Matuszek, M (Mr Matuszek)
Author:Fish, RE (Miss Rebecca Fish)
Author:Johnson, PG (Dr Peter Johnson)
Author:Dean, GJ (Mr Geoffrey Dean)
ID Code:85277
Year Published:2013
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2013-06-24
Last Modified:2013-06-27
Downloads:0

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