Nitrogen rates applied at the end of the raining season to improve annual forage distribution of Guaçu grass

Authors

  • Maria Terezza Colozza Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Nutrição Animal e Pastagem, Nova Odessa, SP
  • Joaquim Carlos Werner Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Nutrição Animal e Pastagem, Nova Odessa, SP
  • Vanderley Benedito de Oliveira Leite Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Pólo Regional de Desenvolvimento Tecnológico dos Agronegócios do Centro Oeste, Brotas, SP
  • Waldssimiler Teixeira de Mattos Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Nutrição Animal e Pastagem, Nova Odessa, SP
  • Luciana Gerdes Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Polo Regional de Desenvolvimento Tecnológico dos Agronegócios do Sudoeste Paulista, Unidade de Pesquisa e Desenvolvimento de Itapetininga, Itapetininga, SP

Keywords:

nitrogen concentration, annual dry matter distribution, nitrogen extraction, Pennisetum purpureum

Abstract

The experiment was carried out at Brotas Experimental Station, SP in a soil classified as Quartzpsamment, with the objectives of evaluating the effect of nitrogen rates applied at the end of the raining season (March) upon the dry matter yield, the seasonal forage production along the year; the nitrogen concentration in the forage and; the nitrogen extraction by Guaçugrass (Pennisetum purpureum Schum. cv. Guaçu), during two years (March/1998 to March/ 2000). The experimental design was a complete Randomized Block, with four nitrogen rates (60, 120, 180 and 240 kg ha-1) and 12 replications. The plots measured 6,0 x 4,8m with a cutting area of 9,6 m2. The cuts were effected in the months of May, September, November, January and March of each experimental year. The application of the nitrogen rates at the end of the raining season (March), besides increasing the yearly total forage yield, increased the forage yield during the dry winter period, improving the distribution of the forage production along the year. As an average of the four nitrogen rates, 49% and 37% of the annual yield was produced during the dry period in the first and second experimental year, respectively. The nitrogen extraction by the grass increased in decreasing proportions as the nitrogen rates raised. The herbage nitrogen concentrations raised linearly with the nitrogen rates in the first two cuttings after the fertilizer application in the two years the experiment, as well as, in the third cutting of the second year.

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Published

2013-11-26

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Nitrogen rates applied at the end of the raining season to improve annual forage distribution of Guaçu grass. (2013). Bulletin of Animal Husbandry, 62(4), 371-379. http://bia.iz.sp.gov.br/index.php/bia/article/view/1284

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