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Sustainability 2014, 6(3), 1153-1162; doi:10.3390/su6031153

Assessment of Rice Inbred Lines and Hybrids under Low Fertilizer Levels in Senegal

1,* , 1
1 Africa Rice Center, Sahel Station, B.P. 96, Saint Louis 46100, Senegal 2 Department of Plant Breeding, Swedish University of Agricultural Sciences (SLU), Box 101, SE 23053 Alnarp, Sweden
* Author to whom correspondence should be addressed.
Received: 12 November 2013 / Revised: 14 February 2014 / Accepted: 18 February 2014 / Published: 28 February 2014
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This research was conducted at the Africa Rice Sahel Regional Station (near Saint Louis, Senegal) during two wet seasons (i.e., July to November) in 2010 and 2011 with the aim of assessing the performances of introduced hybrid cultivars along with an inbred check cultivar under low input fertilizer levels. The five treatments used in this study were (a) the control (without any fertilizer application), (b) 37.5–4.4–8.3 kg N–P–K ha−1, (c) half of recommend application in Senegal (75–8.75–16.5 kg N–P–K ha−1), (d) 112.5–13.3–24.8 kg N–P–K ha−1, and (e) the recommended application in the country (150–17.5–33 kg N–P–K ha−1). There were significant year and cultivar effects for all traits. The fertilizer levels affected significantly most traits except panicle length and 1000-grain weight. The year × fertilizer level and year × cultivar interactions were significant for most traits, but the fertilizer level × cultivar and year × fertilizer level × cultivar interactions were not significant. Days to maturity, plant height, panicle per m2, and grain yield increased with increasing fertilizer levels during the two wet seasons. The grain yield of rice hybrids (bred by the International Rice Research Institute) was not significantly higher than that of the check cultivar widely grown in Senegal. The assessment of other rice hybrid germplasm showing more adaptability to low fertilizer levels will facilitate further hybrid cultivar development in Africa.
Keywords: Africa; hybrid vigor; low input; N-P-K; nutrient-use-efficiency Africa; hybrid vigor; low input; N-P-K; nutrient-use-efficiency
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Kanfany, G.; El-Namaky, R.; Ndiaye, K.; Traore, K.; Ortiz, R. Assessment of Rice Inbred Lines and Hybrids under Low Fertilizer Levels in Senegal. Sustainability 2014, 6, 1153-1162.

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