Improving crop nitrogen use in dryland farming: interactions and potential trade-offs between water- and nutrient-use efficiency
Date
2013
Authors
Garnett, T.
Rebetzke, G.
Editors
Rengel, Z.
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Book chapter
Citation
Improving water and nutrient-use efficiency in food production systems, 2013 / Rengel, Z. (ed./s), Ch.8, pp.123-144
Statement of Responsibility
Trevor P. Garnett and Greg J. Rebetzke
Conference Name
Abstract
Improved nitrogen-use efficiency and water-use efficiency (WUE) of dryland farming crops are important goals for cereal breeders. There have been considerable efforts to improve these traits separately, but now there is an increasing demand for crops with improvement in both of these traits. Analysis of ecological and crop-based experimental data has identified an apparent trade-off between N-use efficiency and WUE, suggesting that the two breeding goals are not compatible. This review summarises the physiology underlying these two traits and the genetic/breeding efforts underway to improve them. It then examines the observed interaction between N-use efficiency and WUE. Understanding the nature of this interaction provides scope to maximise yields in water-limiting environments whilst minimising N losses. Strategies focussing on genetic improvement to improve both traits concurrently are then discussed.
School/Discipline
Dissertation Note
Provenance
Description
Published Online: 10 JAN 2013
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Rights
© 2013 John Wiley & Sons, Inc.