MAIZE PRODUCTIVITY AS A RESULT OF APPLICATION OF CONTROLLED AND SLOW RELEASE UREA

Autores

  • SAMUEL STREGE CARLOS Instituto Federal Catarinense Campus Santa Rosa do Sul.
  • ELIETE DE FÁTIMA FERREIRA DA ROSA Instituto Federal Catarinense Campus Santa Rosa do Sul.
  • JÉSSICA FERNANDES KASEKER Instituto Federal Catarinense Campus Santa Rosa do Sul.
  • THAIS FRANCINI SOKAL Instituto Federal Catarinense Campus Santa Rosa do Sul.
  • MARCOS ANDRÉ NOHATTO Instituto Federal Catarinense Campus Santa Rosa do Sul.

DOI:

https://doi.org/10.18512/rbms.2020.v19.e1116

Palavras-chave:

Nitrogen, dicyandiamide, NBPT, polymer-coated urea, Zea mays.

Resumo

Nitrogen (N) is the main limiting nutrient for productivity and yield
components of maize crop. Urea is the main nitrogen source used, which, despite the high N concentration (45%), presents many losses through leaching and volatilization.
In view of that, the purpose of the experiment was to evaluate the effect of applying N doses with urease inhibitor, nitrification inhibitor and slow-release urea, in relation to the conventional urea, on productivity and yield components of maize crop. The experiment was conducted in the municipality of Santa Rosa do Sul, state of Santa Catarina, in a 4x5 factorial scheme, where factor A corresponded to four nitrogen protection mechanisms (urea with urease inhibitor, urea with nitrification inhibitor, slow-release urea and conventional urea) and factor B corresponded to the surfaceapplied nitrogen percentage for the aforementioned protection mechanisms (0%, 25%, 50%, 75% and 100%). Under the edaphoclimatic conditions of the present study, fertilizers with inhibitors (nitrification and urease) and with slow release do not significantly increase maize productivity in relation to the conventional urea and, regardless of the source used, it is possible to reduce the recommended dose by 25%, based on soil analysis, without significantly impacting maize productivity.

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Publicado

12-03-2020

Como Citar

CARLOS, S. S., FERREIRA DA ROSA, E. D. F., KASEKER, J. F., SOKAL, T. F., & NOHATTO, M. A. (2020). MAIZE PRODUCTIVITY AS A RESULT OF APPLICATION OF CONTROLLED AND SLOW RELEASE UREA. REVISTA BRASILEIRA DE MILHO E SORGO, 19, 11. https://doi.org/10.18512/rbms.2020.v19.e1116

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