Multiple resources limitation and its impact on resource use efficiency and yield gaps of cereal crops under Mediterranean conditions

Mariano Cossani1, Roxana Savin2, Gustavo A. Slafer2, 3, Victor O. Sadras1

1 SARDI, Waite Building 11a Hartley Grove, Adelaide, SA, 5001, http://pir.sa.gov.au/research, mariano.cossani@sa.gov.au          

2 Department of Crop and Forest Sciences and AGROTECNIO (Center for Research in Agrotechnology) – University of Lleida, Av. Rovira Roure 191, Lleida, Spain, 25198

3 ICREA, Catalonian Institution for Research and Advanced Studies, Spain

Abstract

Resource limitation, chiefly water and nitrogen, is common for farming systems in Mediterranean environments. Co-limitation of resources was proved in cereal and oilseed crops as well as in many other ecosystems. However, co-limitation involving more than two resources is not frequently explored. In this study, the objective was to develop and test a new method for estimating co-limitation of multiple resources in a case study with wheat and barley crops in Mediterranean environments. The three-way co-limitation between water, nitrogen and radiation explained the yield gaps and water use efficiency of the crops.

Host

The Australian Society of Agronomy is the professional body for agronomists in Australia. It has approximately 500 active members drawn from government, universities, research organisations and the private sector.

Photo Credits

David Marland Photography david_marland@hotmail.com Southern Farming Systems Agriculture Victoria

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