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

Ghislain Kanfany, Raafat El-Namaky, Kabirou Ndiaye, Karim Traore and Rodomiro Ortiz
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Ghislain Kanfany: Africa Rice Center, Sahel Station, B.P. 96, Saint Louis 46100, Senegal
Raafat El-Namaky: Africa Rice Center, Sahel Station, B.P. 96, Saint Louis 46100, Senegal
Kabirou Ndiaye: Africa Rice Center, Sahel Station, B.P. 96, Saint Louis 46100, Senegal
Karim Traore: Africa Rice Center, Sahel Station, B.P. 96, Saint Louis 46100, Senegal
Rodomiro Ortiz: Department of Plant Breeding, Swedish University of Agricultural Sciences (SLU), Box 101, SE 23053 Alnarp, Sweden

Sustainability, 2014, vol. 6, issue 3, 1-10

Abstract: 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 m 2 , 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 (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2014
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