Hirich, A. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco , Choukr-Allah, R. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco , FAHMI, H. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco , RAMI, A. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco , LAAJAJ, K. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco , JACOBSEN, S. Copenhagen University - Faculty of Life Sciences - Department of Agricultural Sciences, Denmark , El omari, H. Agronomic and Veterinary Hassan II Institute - Department of Horticulture, Complex of Horticulture, Morocco

Using deficit irrigation to improve crop water productivity of sweet corn, chickpea, faba bean and quinoa: a synthesis of several field trials

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Several experiments were conducted in the south of Morocco (IAV-CHA, Agadir) during two seasons 2010 and 2011 in order to evaluate the effect of deficit irrigation with treated wastewater on several crops (quinoa, sweet corn, faba bean and chickpeas). During the first season (2010) three crops were tested, quinoa, chickpeas and sweet corn applying 6 deficit irrigation treatments during all crop stages alternating 100% of full irrigation as non-stress condition and 50% of full irrigation as water deficit condition applied during vegetative growth, flowering and grain filling stage. For all crops, the highest water productivity and yield were obtained when deficit irrigation was applied during the vegetative growth stage. During the second season (2011) two cultivars of quinoa, faba bean and sweet corn have been cultivated applying 6 deficit irrigation treatments (rainfed, 0, 25, 50, 75 and 100% of full irrigation) only during the vegetative growth stage, while in the rest of crop cycle full irrigation was provided except for rainfed treatment. For quinoa and faba bean, treatment receiving 50% of full irrigation during vegetative growth stage recorded the highest yield and water productivity, while for sweet corn applying 75% of full irrigation was the optimal treatment in terms of yield and water productivity.

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water stress , water productivity , evapotranspiration , yield , crop stage

Revue Marocaine des Sciences Agronomiques et Vétérinaires

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