Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments

Authors

  • Eduardo de Paula Simão Universidade Federal de Viçosa, Centro de Ciências Agrárias, Departamento de Fitotecnia, Campus Universitário, Avenida P.H. Rolfs, s/no, CEP 36571-900 Viçosa, MG.
  • Álvaro Vilela de Resende Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Miguel Marques Gontijo Neto Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Alexandre Ferreira da Silva Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Vicente de Paulo Campos Godinho Embrapa Rondônia, Rodovia BR-364, Km 5.5, Zona Rural, Caixa Postal 127, CEP 76815-800 Porto Velho, RO.
  • José Carlos Cardoso Galvão Universidade Federal de Viçosa, Centro de Ciências Agrárias, Departamento de Fitotecnia, Campus Universitário, Avenida P.H. Rolfs, s/no, CEP 36571-900 Viçosa, MG.
  • Emerson Borghi Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Antônio Carlos de Oliveira Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 285 ou 151, CEP 35701-970 Sete Lagoas, MG.
  • Jeferson Giehl Universidade Federal de Viçosa, Centro de Ciências Agrárias, Departamento de Fitotecnia, Campus Universitário, Avenida P.H. Rolfs, s/no, CEP 36571-900 Viçosa, MG.

DOI:

https://doi.org/10.1590/S1678-3921.pab2020.v55.26854

Keywords:

Zea mays, efficient N use, N requirement, second corn crop, soybean-corn succession

Abstract

The objective of this work was to assess the grain yield and the economic response of off-season corn (Zea mays) crop subjected to different combinations of starter and topdressing nitrogen fertilization, in the Brazilian Cerrado region. The experiment was carried out in a randomized complete block design in a 3×4 factorial arrangement (0, 45, and 90 kg ha-1 N at sowing and 0, 22.5, 45, and 90 kg ha-1 N in topdressing as urea), in six environments, combining three sites and two sowing times. Grain yield was determined, and the response to total N applied as starter and topdressing was used to obtain a general model of the average trend of the technical and economic return of fertilization. The corn crop response varied according to the environment, and the observed yields were high. The application of N as a starter fertilizer increased corn yield and improved the effect of topdressing fertilization or even made it unnecessary. Fertilization with 90 kg ha-1 N as urea promotes greater yield and economic return and improves N balance in the soybean/off-season corn crop system.

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Published

2020-12-28

How to Cite

Simão, E. de P., Resende, Álvaro V. de, Gontijo Neto, M. M., Silva, A. F. da, Godinho, V. de P. C., Galvão, J. C. C., … Giehl, J. (2020). Nitrogen fertilization in off-season corn crop in different Brazilian Cerrado environments. Pesquisa Agropecuaria Brasileira, 55(X), e01551. https://doi.org/10.1590/S1678-3921.pab2020.v55.26854

Issue

V.55, Jan./Dec., 2020 :Continuos publication

Section

CROP SCIENCE