Sugar cane supplemented with urea levels: rumen fermentation and plasma urea-n concentrations in dairy cows

Authors

  • Soraia Vanessa Matarazzo Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Nova Odessa, SP
  • Wilson Roberto Soares Mattos Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Zootecnia, Piracicaba, SP
  • Maria Cláudia Araripe Sucupira Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Clínica Médica, São Paulo, SP
  • Paulo Farano Stacchini Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Zootecnia, Piracicaba, SP
  • José Manuel Correa de Simas Elanco Saúde Animal, São Paulo, SP
  • Alexandre Vaz Pires Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Zootecnia, Piracicaba, SP

Keywords:

volatile fatty acids, ammonia concentrations, pH, dairy cows

Abstract

Four cow fitted with rumen cannulae were used in a 4 x 4 Latin Square design to investigate the rumen fermentation and the plasma urea-N concentration. The animals were fed with sugarcane as the exclusive roughage and supplemented with soybean meal in the treatment 0%UR or urea at levels of 1.0%; 1.5% and 2.0% of fresh sugarcane. Daily dry matter intake was higher (P<0.05) for treatment 0%UR (7.76 Kg DMI/day) than treatment 1.0%UR (4.94kg DMI/ day), 1.5%UR (5.53kg DMI/day) and 2.0%UR (4.02 Kg DMI/day). The pH, total volatile fatty acids concentrations, the percents of acetic and propionic acids, acetic:propionic ratio and ammonia concentrations showed quadratic effect (P<0.05) between 0-10 hours and 12-22 hours. Differences were observed (P<0.05) among the treatments in both periods for the ammonia and plasma urea- N concentrations. There were treatment effects (P<0.05) on pH and acetic:propionic ratio between 12-22 hours.

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Published

2013-11-26

Issue

Section

ANIMAL NUTRITION

How to Cite

Sugar cane supplemented with urea levels: rumen fermentation and plasma urea-n concentrations in dairy cows. (2013). Bulletin of Animal Husbandry, 63(3), 143-149. http://bia.iz.sp.gov.br/index.php/bia/article/view/1265

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