Levels in Protein Supplements for Steers Grazing Mombaça Pasture during the Winter - DOI: 10.4025/actascianimsci.v28i1.665

• Autor(a) principal: Moreira, Fernanda Barros
• Data de Publicação: 2008
• Outros Autores: Mizubuti, Ivone Yurita, Prado, Ivanor Nunes do, Rocha, Marco Antônio da, Ribeiro, Edson Luis de Azambuja, Matsubara, Marcelo Takeo
• 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/665
• topic: entressafra; ganho de peso; novilhos; proteína degradável; sal proteinado

This work objective was to evaluate the effect of different urea levels in protein supplements compared to mineral supplements on the performance of steers grazing Mombaça pasture, during the winter. Thirty six steers were used (±347 kg, ±18 months), splited into 4 treatments: protein mineral salt supplement with 5% of urea (SP5); 10% of urea (S10); 15% of urea (S15); mineral sal supplementation (SMI). There was a quadratic effect of the urea levels on the average daily gain (ADG), and the best ADG was for the S10 treatment (0,87 kg/day). In the first 28 days of supplementation, there was a reduction on the ADG as the urea levels rise. There was a decreased in the supplements intake when the urea porcentage increased. Considering the costs, the better net income was for the S10 treatment, were the excedent gain was of R$0.41/animal/day.