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A Short Overview of Measures for Securing Water Resources for Irrigated Crop Production

A Short Overview of Measures for Securing Water Resources for Irrigated Crop Production Agriculture is the main user of limited fresh water resources in the world. Optimisation of agricultural water resources and their use can be obtained by both agronomical and political incentives. Important options are: reduction of the loss of irrigation water in conveyance before it reaches the farm; selection of water‐efficient irrigation methods such as drip and micro‐irrigation saving 30–40 % water compared to furrow irrigation; improvement of irrigation scheduling using plant and soil sensors and remote sensing‐based models; deficit irrigation (DI) raising the water productivity in the range of 10–50 %; use of saline and wastewater for which modelling tools lately have been developed; introduction of drought and salt‐tolerant crops eases the use of DI and use of saline water; improvement of cropping systems with development of conservation agriculture. Further options are: use of the ‘virtual water’ principles so that water‐rich regions secure food supply to dry regions; reduction in waste of food, feed and biofuel from post‐harvest to the end consumer; changing of food composition to less water‐consuming products; regulating amount of irrigation water by rationing, subsidies or water pricing to support water‐saving measures such as use of drip, irrigation scheduling and DI. The potential for water saving for different measures is discussed and estimated. Reduction in waste of food and loss of irrigation water from conveyance source to farm both has a great potential for water saving compared to other measures. How to choose the measures will depend on the local situation, which is ultimately a political choice. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

A Short Overview of Measures for Securing Water Resources for Irrigated Crop Production

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Publisher
Wiley
Copyright
Copyright © 2014 Blackwell Verlag GmbH
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/jac.12067
Publisher site
See Article on Publisher Site

Abstract

Agriculture is the main user of limited fresh water resources in the world. Optimisation of agricultural water resources and their use can be obtained by both agronomical and political incentives. Important options are: reduction of the loss of irrigation water in conveyance before it reaches the farm; selection of water‐efficient irrigation methods such as drip and micro‐irrigation saving 30–40 % water compared to furrow irrigation; improvement of irrigation scheduling using plant and soil sensors and remote sensing‐based models; deficit irrigation (DI) raising the water productivity in the range of 10–50 %; use of saline and wastewater for which modelling tools lately have been developed; introduction of drought and salt‐tolerant crops eases the use of DI and use of saline water; improvement of cropping systems with development of conservation agriculture. Further options are: use of the ‘virtual water’ principles so that water‐rich regions secure food supply to dry regions; reduction in waste of food, feed and biofuel from post‐harvest to the end consumer; changing of food composition to less water‐consuming products; regulating amount of irrigation water by rationing, subsidies or water pricing to support water‐saving measures such as use of drip, irrigation scheduling and DI. The potential for water saving for different measures is discussed and estimated. Reduction in waste of food and loss of irrigation water from conveyance source to farm both has a great potential for water saving compared to other measures. How to choose the measures will depend on the local situation, which is ultimately a political choice.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Jan 1, 2014

Keywords: ; ; ; ; ;

References