Times and rates of nitrogen fertilization affecting the seasonal production of Brachiaria humidicola

Authors

  • Michelle Nazaré Xavier da Costa Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Produção Animal, Piracicaba, SP
  • Herbert Barbosa de Mattos Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Produção Animal, Piracicaba, SP
  • Moema Ferreira Bueno Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Produção Animal, Piracicaba, SP
  • Carlos Tadeu dos Santos Dias Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Matemática e Estatística, Piracicaba, SP
  • Vanderley Benedito de Oliveira Leite Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Estação Experimental de Zootecnia, Brotas, SP

Keywords:

Brachiaria humidicola, dry matter yield and chemical composition

Abstract

This work had the objective to evaluate the seasonal production of Brachiaria humidicola submitted to different times and rates of nitrogen fertilization. A field experiment was accomplished being adopted the experimental block design randomized in a fatorial combination, to evaluate the effects of N rates (50, 100 and 150 kg ha-1), three sfreading times (total in November, 1/2 in November and 1/2 in March and 1/3 in November and 2/3 in March) and two periods ("Summer" and "Winter") with nine replications. The dry matter productions and chemical composition were evaluated. The Brachiaria humidicola had its dry matter production distribution influenced by the application times with larger productions in the "summer" period. The application 1/3 of the rate of N in November and 2/3 in March provided improvement in the distribution of dry matter production (78% in the "Summer" and 22% in the "Winter"). The contents of crude protein also suffered effects of the seasonal production being higher in the "Winter" period with the parceled out application of N. Except for nitrogen, the others macronutrients came in considered normal levels contents adapted for the tropical grasses. The relationships N/S and Ca/P were also affected by the periods, independently of the times of N application, being found larger relationships N/S in the "Summer" period and larger Ca/P in the "Winter".

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Published

2013-12-02

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Times and rates of nitrogen fertilization affecting the seasonal production of Brachiaria humidicola. (2013). Bulletin of Animal Husbandry, 58(2), 153-167. http://bia.iz.sp.gov.br/index.php/bia/article/view/1376

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