African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6688

Full Length Research Paper

Wheat yield obtained from nitrogen dose and fractionation

Ana Paula Brezolin
  • Ana Paula Brezolin
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Jose Antonio Gonzalez da Silvae
  • Jose Antonio Gonzalez da Silvae
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Fabricia Roos-Frantz
  • Fabricia Roos-Frantz
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Manuel Osorio Binelo
  • Manuel Osorio Binelo
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Cleusa Adriane Menegassi Bianchi Kruger
  • Cleusa Adriane Menegassi Bianchi Kruger
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Emilio Ghisleni Arenhardt
  • Emilio Ghisleni Arenhardt
  • Department of Plowing Plants, Federal University of Rio Grande do Sul (UFRGS), 7712 Bento Gonçalves Avenue, Porto Alegre, RS, 91540-000, Brazil.
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Anderson Marolli
  • Anderson Marolli
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Rubia Diana Mantai
  • Rubia Diana Mantai
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Osmar Bruneslau Scremin
  • Osmar Bruneslau Scremin
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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Eldair Fabricio Dornelles
  • Eldair Fabricio Dornelles
  • Departament of Exact Science and Engineering, Regional Northwest University of Rio Grande do Sul (UNIJUÍ), 3000 Comércio Street, Ijuí, RS, 98700-000, Brazil.
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  •  Received: 09 November 2016
  •  Accepted: 19 January 2017
  •  Published: 23 February 2017

Abstract

It is possible to increase nitrogen for wheat productivity by adjusting the single and fractionated dose based on the condition of the agricultural year. The objective of this work is to study the  highest  amount of nitrogen used for the production of wheat using single dose  or fractionation under favorable and unfavorable cultivation years. The study was conducted in  2012, 2013 and 2014 in Augusto Pestana, Rio Grande do Sul, Brazil. The experimental design was a randomized block in a 4 × 3 factorial scheme with four replications. It consists of N-fertilizer rates (0, 30, 60 and 120 kg ha-1), forms of supply [single (100%), growth stage V3 (third expanded sheet); fractionated (70%/30%) growth stage V3/V6 (third and sixth expanded sheet); fractionated (70%/30%) phonological stage V3/E (third expanded leaf and early grain filling)]. In favorable, intermediate and unfavorable years, wheat cultivated with single dose of nitrogen is more effective than the grain fractionated, regardless of the succession system. Nitrogen use efficiency can be substantially reduced or increased in wheat based on  the condition of the year of cultivation and the use of the optimal dose of the nutrient may not necessarily express maximum grain yield with economic efficiency.

 

Key words: Triticum aestivum, relation C/N, meteorological condition, simulation.