Effect of protected urea feeding on ciliated rumen protozoa population of lambs

• Autor(a) principal: Nogueira Filho, José Carlos Machado
• Data de Publicação: 2008
• Outros Autores: Titto, Evaldo Antonio Lencioni, Oliveira, Maria Ely Miserochi de, Ablas, Denise de Souza, Oliveira, Tatiana Sá Barreto Miserochi de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3142
• topic: ovinos; protozoários ciliados (Ciliphora); rúmen; uréia; 5.04.00.00-2 Zootecnia

Twelve male Hampshire Down lambs, average weight 29,37 kg (3,89 kg) and 6 months old, were used in a trial with 4 handlings, using Andropogon grass hay, soy meal and (GPS) at different rates. 18 g of protected urea were added to handlings B and C. Protein levels were given at 100% of NRC requirements (A and B rations) and at 70% (C and D rations). Ruminal fluid samples were obtained at the last day of the trial, one hour after the feeding of animals. Urea stimulated the division of entodimomorphic ciliates (handlings B and C, p ≤ 0,01). Average values for ciliates were 49,54 and 39.02 x 103 ml-1 respectively for handlings with and without urea. Results show that included quantities of 18 g of protected urea failed to induce metabolic disorder in animals.