Preprint Article Version 1 This version is not peer-reviewed

Nitrogen Use Efficiency and Yield of Maize Varieties as affected by Nitrogen rate in Mid Altitude Areas of Western Ethiopia

Version 1 : Received: 25 February 2019 / Approved: 26 February 2019 / Online: 26 February 2019 (12:26:08 CET)

How to cite: Abera Goshu, T.; Wegary Gissa, D.; Debele Dalessa, T. Nitrogen Use Efficiency and Yield of Maize Varieties as affected by Nitrogen rate in Mid Altitude Areas of Western Ethiopia. Preprints 2019, 2019020239 (doi: 10.20944/preprints201902.0239.v1). Abera Goshu, T.; Wegary Gissa, D.; Debele Dalessa, T. Nitrogen Use Efficiency and Yield of Maize Varieties as affected by Nitrogen rate in Mid Altitude Areas of Western Ethiopia. Preprints 2019, 2019020239 (doi: 10.20944/preprints201902.0239.v1).

Abstract

Maize (Zea mays L.) is the most widely grown important crop in mid altitude areas of intensive maize-based cropping system of western Ethiopia. Agronomic management is the most important input for getting potential yield and high net returns in hybrid maize production. A field experiment was carried out on farmers’ field to find out the effect of varieties (four maize) and nitrogen fertilizer rate (55, 110 kg N ha-1) with one control on yield components and nitrogen use efficiency of different maize varieties in 2013 and 2014 cropping season. It was laid with randomized complete block design in factorial arrangement with three replications. Mean grain yield, thousand seed weight, dry biomass and harvest index of maize varieties were significantly differed among farms and varieties of maize. Application of nitrogen fertilizer rates was significantly increased mean grain yield maize varieties. Interaction of maize varieties with nitrogen fertilizer rates was significantly affected all yield components of maize varieties. Application half and full recommended nitrogen fertilizer gave mean grain yield advantages of 31 and 41 % over control maize varieties planted without nitrogen application. Maize varieties producing higher mean grain yield was also giving higher mean dry biomass. Mean nitrogen up take was varied from 225 to 357 kg ha-1 among varieties of maize. Higher agronomic efficiency of all maize varieties was obtained from maize planted with application half recommended nitrogen fertilizer compared to full recommend. Agronomic efficiency was ranged from 18 to 33 produced among maize varieties. Significantly higher nitrogen up take efficiency of maize varieties was achieved from maize planted with full recommended nitrogen fertilizer application. Considerably higher nitrogen use efficiency of maize varieties was realized from all maize varieties planted with application half recommended nitrogen fertilizer. Application of half recommended nitrogen fertilizer was gave 32 % fertilizer N use efficiency advantage as compared to full recommended nitrogen fertilizer. Maize varieties BH-661>BH-660> BH-543>BH-540>BH-140 were desirable varieties for further promotion work and use by smallholder farmers in mid altitude area of western Ethiopia.

Subject Areas

Nitrogen, N accumulation, nitrogen use efficiency, variety, maize

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