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

Nitrogen accumulation and productivity of green corn in function of ways and seasons of top-dressing nitrogen fertilizer application

Joao Paulo de Morais Oliveira
  • Joao Paulo de Morais Oliveira
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Adilson Pela*
  • Adilson Pela*
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Dalton Ribeiro
  • Dalton Ribeiro
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Bruna Santos de Oliveira
  • Bruna Santos de Oliveira
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Leandro Mariano da Silva
  • Leandro Mariano da Silva
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Jessica Ferreira Silva
  • Jessica Ferreira Silva
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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Patrícia Souza da Silveira
  • Patrícia Souza da Silveira
  • State University of Goiás (UEG), Ipameri Campus, Graduation Program on Plants Production. Goiás, Brazil.
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  •  Received: 07 June 2016
  •  Accepted: 01 August 2016
  •  Published: 01 September 2016

Abstract

Nitrogen is one of the nutrients required in large amounts by plants and mostly influences corn yield. With the objective of evaluating the best timing and methods of N fertilizer application in topdressing on corn, this experiment was carried out in Ipameri County, State of Goiás, Brazil, on a Red Yellow Latossol (Ferralsol). The treatments were distributed in a randomized complete block design with four replications. The applied treatments were: control: 100% N applied on the surface after planting; 100% N applied on the surface in V4 phase; 50% N applied on the surface at V4 and 50% N applied on the surface at V6 phases; 100% N applied on the surface in V6 phase; 100% N applied in continuous fillet at V4 phase; 100% N applied in continuous fillet at V6 phase; 50% N in continuous fillet applied at V4 and 50% N in continuous fillet applied at V6 phases. The data were subjected to variance analysis by test 'F' and the means were compared by Tukey test (P <0.05). The nitrogen fertilization increased the length of ears with and without husk, the diameter of ear without husk, ears green yield with and without husk, number of grains per row and grain yield. The N application mode in continuous fillet provided greater averages for the characteristics evaluated. The N application time influences the absorption and accumulation of N in the shoots of corn.

Key words: Absorption, nitrogen fertilization, application methods, nutrition.