Effect of nitrogen fertilizer rates and intra-row spacing on yield and yield components of onion (Allium cepa L. Var. cepa) under irrigation in Gode, South-Eastern Ethiopia

Weldemariam Seifu Gessesew1*, Kebede Woldetsadik2 and Wassu Mohammed2

1* Department  of  Horticulture,  College of Veterinary Medicine and Agriculture, Addis Ababa University, P O Box 245, Fiche, Ethiopia.

2 Department of Plant Sciences, Haramaya University, P O Box 138, Dire-Dawa, Ethiopia.

Accepted 08 September, 2015.

Citation: Gessesew WS, Woldetsadik K, Mohammed W (2015). Effect of Nitrogen Fertilizer Rates and Intra-Row Spacing on Yield and Yield Componenets of Onion (Allium cepa L. Var. cepa) Under Irrigation in Gode, South-Eastern Ethiopia. International Journal of Plant Breeding and Crop Science, 2(2): 046-054.

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Copyright: © 2015 Gessesew et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract

A field experiment was conducted at Gode Polytechnic College demonstration farm in 2013 under irrigation to observe the effect of six N rates (0, 46, 69, 92, 115 and 138 kg ha-1) and four intra-row spacing levels (7.5, 10 12.5 and 15 cm) on yield and yield components of onion (Allium cepa L.). The experiment was laid out according to randomized complete block design in factorial arrangement with three replications. Results of the analysis revealed that the interaction effects of N rates and intra-row spacing showed highly significant (P<0.01) effect on harvest index, fresh biomass yield, dry biomass yield, total bulb yield and marketable bulb yield. Thus, according to the result of partial Budget analysis application of 138kg N ha-1 planted at 7.5cm plant to plant distance was found the best treatment than others in relation to yield and yield components of onion under Gode condition.

Keywords: Allium cepa, intra-row, nitrogen, onion, spacing, yield components, yield, irrigation.