Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Adaptive management of irrigated rice in the changing environments of the Sahel

Auteur : Vries, Michiel .E. de

Université de soutenance : Wageningen University

Grade : PhD thesis 2011

Résumé partiel
In the vulnerable environment of the Sahel with its erratic rainfall pattern, irrigated rice production is of major importance. To aid Sahelian rice farmers to sustain irrigated rice production, this study explores management options. It includes field experiments performed at two typical Sahelian sites and simulation studies using crop growth simulation models. This thesis provides evidence that it is possible to use less irrigation water while maintaining rice production, thus increasing water productivity. The effects of a temperature increase on the growing cycle and spikelet sterility of new rice varieties in interaction with different sowing dates is quantified. The simulation results show that the sowing window will be restricted and that the cultivar choice may alter ; together they will remain the most important determinants of rice production in the coming decades

Mots clés : oryza sativa - rice - irrigated farming - irrigation - climatic change - simulation models - genotype environment interaction - senegal - sahel

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