African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Response of roselle (Hibiscus sabdariffa L.) to rates of inorganic and farmyard fertilizers in the Sudan savanna ecological zone of Nigeria

  C. I. Oyewole1* and M. Mera2        
  1Department of Crop Production, Faculty of Agriculture, Kogi State University, P. M. B. 1008, Anyigba, Kogi State, Nigeria. 2Kebbi State Agricultural Development Authority, Kebbi, Kebbi State, Nigeria.
Email: [email protected]

  •  Accepted: 25 August 2010
  •  Published: 04 September 2010

Abstract

 

Field trials conducted in two rainy seasons at the Usmanu Danfodiyu University, Sokoto, Nigeria, were used to investigate the response of Roselle to organic manure (2.5, 5.0 and 7.5 tons/ha cow dung) and nitrogen (N) fertilizer (25, 50, and 75 kg/ha as urea) applications. The results of the analysis of the experimental data show that calyx yield, pods/plant and seeds/pod responded significantly (P < 0.05) to manure and nitrogen applications in both years (2005 and 2006), while days to 50% flowering did not respond significantly to manure or N-fertilization. However, days to 50% flowering increased with manure, or N-application. For calyx, pod and seed production, application of manure at 7.5 t/ha or N at 75 kg N/ha gave the best result. 

 

Key words: Roselle, manure, nitrogen fertilizer, calyx yield, pods/plant and seeds/pod.