Decomposition and nitrogen release in areas with and without grazing and its influence on corn

Autores

  • Christiano Santos Rocha Pitta Instituto Federal do Paraná
  • Adelino Pelissari Universidade Federal do Paraná
  • André Luis Finkler da Silveira Instituto Agronômico do Paraná
  • Paulo Fernando Adami Instituto Federal do Paraná
  • Laércio Ricardo Sartor Universidade Tecnológica Federal do Paraná
  • Tangriani Simioni Assmann Universidade Tecnológica Federal do Paraná
  • Francisco Migliorini Universidade Tecnológica Federal do Paraná

DOI:

https://doi.org/10.5433/1679-0359.2013v34n2p905

Palavras-chave:

Black oat, Grain yield, Supplementation, Decomposition rate.

Resumo

This study aimed to evaluate the dry matter decomposition and N release from black oat residues and dung from goats, as well as its influence on corn yield grown in succession under increasing levels of N applied in topdressing. At winter, treatments consisted of different levels of a dietary supplement corresponding to 0, 5, 10 and 15 g kg-1 of body weight of females, Boer goats grazing oat cv. IAPAR 61 and a treatment without grazing. During the winter period were evaluated: forage sward, mass and its forage production, stocking rate, animal live weight gain, content of mineral N in the soil. At the end of grazing period, dry matter decomposition rate and N release from black oat residual biomass and animal dung were evaluated. At summer, main plots were divided into sub-plots and N applied at increasing levels over the corn crop (0, 50, 100 and 150 kg ha-1 of N as urea). During this period, corn yield was evaluated. Grazed areas at winter under increasing levels of supplementation resulted in an increase of animal production and increased dry matter decomposition rate and N release from the pasture when compared to ungrazed areas. At the ungrazed areas, it was necessary to apply 150 kg ha-1 of N in sidedress to ensure the same corn yield obtained at the grazing treatments without N application.

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Biografia do Autor

Christiano Santos Rocha Pitta, Instituto Federal do Paraná

Prof. do Instituto Federal do Paraná, Palmas, PR.

Adelino Pelissari, Universidade Federal do Paraná

Prof. da Universidade Federal do Paraná, UFPR, Curitiba, PR.

André Luis Finkler da Silveira, Instituto Agronômico do Paraná

Pesquisador do Instituto Agronômico do Paraná, IAPAR, Pato Branco, PR.

Paulo Fernando Adami, Instituto Federal do Paraná

Prof. do Instituto Federal do Paraná, Palmas, PR.

Laércio Ricardo Sartor, Universidade Tecnológica Federal do Paraná

Prof. da UFPR, Dois Vizinhos, PR.

Tangriani Simioni Assmann, Universidade Tecnológica Federal do Paraná

Profª da UFPR, Pato Branco, PR.

Francisco Migliorini, Universidade Tecnológica Federal do Paraná

Discente da Pós-graduação em Agronomia da Universidade Tecnológica Federal do Paraná, UFPR, Pato Branco, PR.

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Publicado

2013-05-14

Como Citar

Pitta, C. S. R., Pelissari, A., Silveira, A. L. F. da, Adami, P. F., Sartor, L. R., Assmann, T. S., & Migliorini, F. (2013). Decomposition and nitrogen release in areas with and without grazing and its influence on corn. Semina: Ciências Agrárias, 34(2), 905–920. https://doi.org/10.5433/1679-0359.2013v34n2p905

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