African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6183

Full Length Research Paper

Application of nitrogen in different phenological states of the corn crop

Eulalio Morel López
  • Eulalio Morel López
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Florencio David Valdez Ocampo
  • Florencio David Valdez Ocampo
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Amílcar Isidro Servín Niz
  • Amílcar Isidro Servín Niz
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Modesto Osmar Da Silva Oviedo
  • Modesto Osmar Da Silva Oviedo
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Oscar Caballero Casuriaga
  • Oscar Caballero Casuriaga
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Wilfrido Lugo Pereira
  • Wilfrido Lugo Pereira
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Derlys Fernando López Ávalos
  • Derlys Fernando López Ávalos
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Carlos Alberto Mongelos Barrios
  • Carlos Alberto Mongelos Barrios
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Edith Ruiz Díaz
  • Edith Ruiz Díaz
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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Ruth Ester Pistilli
  • Ruth Ester Pistilli
  • Universidad Nacional de Concepción (UNC), Concepción, Paraguay.
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  •  Received: 12 December 2018
  •  Accepted: 19 February 2019
  •  Published: 14 March 2019

Abstract

Corn is a crop of high productive potential, but to achieve this, it is essential to apply production technologies, especially fertilizers with a high level of nitrogen. The objective of this work was to evaluate the influence of nitrogen fertilizer in different phenological stages on corn production. The experiment was installed in the experimental plot of the Facultad de Ciencias Agrarias, Universidad Nacional de Concepción, Concepción Department, Paraguay. The experimental design was randomized blocks, with 5 treatments and 4 repetitions. The treatments consisted of the application of nitrogenous fertilizer in the phenological stages V0, V3, V5, V7 and V9. Number of leaves on and below the spike, number of seed lines per spike, plant height, spike height and yield were evaluated. The obtained data was subjected to the analysis of variance by Fisher's test at 5%, when significant differences was detected, it was proceeded to compare the means obtained by the effect of the treatments using the Tukey test at 5% of significance. The results indicate that the application of nitrogen in different phenological stages of corn cultivation influenced the height of the plant, height of insertion of the spike and yield; not so, for: number of leaves above and below the spike and number of seed lines per spike. It is concluded that the application of nitrogen in different phenological stages of corn, has influence on productive characteristics of the crop. It was recommended that  it should be done in phenological stage V5, to achieve maximum efficiency.

Key words: Zea mays L., phenological stages, nitrogen, fertilization.