Suitable management options to improve the productivity of rice cultivars under salinity stress |
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| Authors: | Valère Cesse Mel Vincent Boubié Bado Saliou Ndiaye Koffi Djaman Delphine Aissata Bama Nati Baboucarr Manneh |
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| Institution: | 1. Sustainable Productivity Enhancement Program, Africa Rice Center (AfricaRice), Saint-Louis, Senegal;2. Ecole Doctorale Développement Durable et Société, Université de Thiès (UT), Thiès, Sénégal;3. Sahelian Center, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Niamey, Niger;4. Ecole Doctorale Développement Durable et Société, Université de Thiès (UT), Thiès, Sénégal;5. Department of Plant and Environmental Sciences, New Mexico State University, Agricultural Science Center at Farmington, Farmington, CT, USA;6. Production végétale, Institut de l’environnement et de la recherché agricole (INERA), Ouagadougou, Burkina Faso;7. Genetic Diversity and Improvement Program, Africa Rice Center (AfricaRice), Saint-Louis, Senegal |
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| Abstract: | Growing rice in saline soils by minimizing damage on growth and yield remains a challenge. We conducted field experiments in the Africa Rice research field located in the Senegal River delta (16° 11? N, 16° 15? W) to study the effects of three management options of fertilization e.g. (i) nitrogen, phosphorus, and potassium fertilization: NPK; (ii) NPK combined with zinc: NPK-Zn, and (iii) NPK combined with gypsum: NPK-gypsum on the soil salinity level, the nutrient uptake and the productivity of different rice cultivars. The whole objective of this study is to determine how zinc or gypsum associated to NPK fertilizer can improve the growth and productivity of rice crop in saline soil. Results showed that the initial soil salinity level was reduced rapidly in plots treated with gypsum. The leaf-K/Na ratio, agronomic nitrogen use efficiency (ANUE), and grain yield of rice cultivars under the salinity stress were improved by the NPK-gypsum and NPK-Zn options relatively to the NPK option, suggesting that NPK-gypsum and NPK-Zn are suitable management options in reducing adverse effect of low K/Na, low ANUE as well as to improve rice yield under salinity stress. |
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| Keywords: | Electrical conductivity (EC) K/Na-ratio Oryza sativa Sahel Senegal |
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