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

Agronomic performance of hybrids and varieties of maize in function of nitrogen in coverage

Diego Corona Baitelle
  • Diego Corona Baitelle
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes - RJ, CEP 28013-602, Brazil.
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Kezia Moraes Vieira
  • Kezia Moraes Vieira
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes - RJ, CEP 28013-602, Brazil.
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Danilo Força Baroni
  • Danilo Força Baroni
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes - RJ, CEP 28013-602, Brazil.
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Francisco Braz Daleprane
  • Francisco Braz Daleprane
  • Departamento de Fitotecnia, Instituto Federal do Espírito Santo – Campus Santa Teresa, rodovia ES-080, Km 93, s/n - São João de Petrópolis, Santa Teresa - ES, CEP 29660-000, Brazil.
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Ismail Ramalho Haddade
  • Ismail Ramalho Haddade
  • Departamento de Fitotecnia, Instituto Federal do Espírito Santo – Campus Santa Teresa, rodovia ES-080, Km 93, s/n - São João de Petrópolis, Santa Teresa - ES, CEP 29660-000, Brazil.
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Sílvio de Jesus Freitas
  • Sílvio de Jesus Freitas
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes - RJ, CEP 28013-602, Brazil.
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Jorge Montoanelli Correa
  • Jorge Montoanelli Correa
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Federal do Espírito Santo, Alegre, 29075-910, ES, Brazil.
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Flávio Wirlan Andrade da Silva
  • Flávio Wirlan Andrade da Silva
  • Programa de Pós-Graduação em Produção Vegetal, Departamento de Fitotecnia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes - RJ, CEP 28013-602, Brazil.
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  •  Received: 26 September 2016
  •  Accepted: 26 October 2016
  •  Published: 29 December 2016

Abstract

This study aims to compare the agronomic performance and the productivity of the corn hybrid AG 1051 and the Incaper Capixaba 203 variety in function of different nitrogen (N) doses in coverage. The experiment was held at the Federal Institute of Espírito Santo - Campus Santa Teresa. The design was of randomized blocks and the treatments were arranged in a split plot scheme, with four repetitions. The plots were represented by two corn genotypes and the subplots consisted of five N doses coverage: 0, 60, 120, 180 and 240 kg ha-1 N. After flowering, the plant height, stem diameter, the height of ear insert and the number of leaves per plant were evaluated. After harvest, the number of grains per spike, the 1000 grain and grain productivity were evaluated. All N dosages influenced all the features evaluated for both genotypes, which showed an increase with the increasing dose of the nutrient. The differences between the genetic materials to all the analyzed variables, except in grain productivity were found. The N dose estimated provides greater productivity for average grain (8785.98 kg ha-1) for both genotypes 207.17 kg ha-1 of N.

Key words: Genetic material, levels of nitrogen, productivity, urea, Zea mays.