Identifying the potential to apply deficit irrigation strategies in cotton using large mobile irrigation machines

White, Simon C. and Raine, Steven R. (2004) Identifying the potential to apply deficit irrigation strategies in cotton using large mobile irrigation machines. In: 4th International Crop Science Congress 2004: New Directions for a Diverse Planet, 26 Sep-1 Oct 2004, Brisbane, Australia.

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Abstract

Irrigation water restrictions in the cotton industry have increased the focus on improving water use efficiency. regulated deficit irrigation (RDI) has been found to improve the water use of efficiency of cotton under drip irrigation. Partial rootzone drying (PRD) has been commercially implemented in grapevines and found to increase the water use efficiency for a variety of crops. This paper investigates the potential to improve cotton water use efficiency using RDI and PRD strategies applied with lateral move machines. A range of RDI treatments (71 % - 100 % evapotranspiration replaced) and a PRD and non-PRD treatment were applied to a crop of Sicot 180 during the 2002/2003 cotton season. No yield reduction was found between the fully irrigated and the 50% RDI treatment that received 1.05 ML/ha less water. Crop WUE was found to increase from 0.94 bales/ha to 1.17 bales/ha as the irrigation water applied was reduced from 100% to 79 % of evapotranspiration replacement. No difference in physiological growth and yield was found due to the implementation of the PRD treatment. Further work is required to confirm the RDI results, further explore the application of PRD strategies using these machines, and to more fully understand the physiological response of cotton to imposed soil moisture deficits applied either by volume (RDI) or space (PRD).


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: No
Item Status: Live Archive
Additional Information: Copyright © 2004. Individual authors retain their copyright. The Regional Institute Ltd retains the non-exclusive right to publish the proceedings from the 4th International Crop Science Congress in electronic format in perpetuity. Reproduction and the making available of this material for personal or non-commercial purposes is authorised, on condition that: • attribution is given to the copyright owner; • no official connection is claimed; • the material is made available without charge or at cost; and • the material is not subject to inaccurate, misleading or derogatory treatment. This publication may be of assistance to you 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 you relying on any information in this publication. First Published 2004 4th International Crop Science Congress Brisbane, Australia, 26 September – 1 October 2004
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 09 Nov 2016 02:54
Last Modified: 10 Aug 2018 02:59
Uncontrolled Keywords: water conservation; water monitoring
Fields of Research : 07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070302 Agronomy
09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8203 Industrial Crops > 820301 Cotton
URI: http://eprints.usq.edu.au/id/eprint/19063

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