Methane emissions and estimates of ruminal fermentation parameters in beef cattle fed different dietary concentrate levels.

• Autor(a) principal: PEDREIRA, M. dos S.
• Data de Publicação: 2013
• Outros Autores: OLIVEIRA, S. G. de, PRIMAVESI, O. M. A. S. P. R., LIMA, M. A. de, FRIGHETTO, R. T. S., BERCHIELLI, T. T.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/968738
• topic: Global greenhouse gases; Nutritional value; SF6; rumen fermentation

sing sorghum silage, the effect of roughage/concentrate ratios was evaluated on nutrient intake, digestibility, ruminal parameters and methane production by beef cattle. Three treatments (0, 30 and 60% of concentrate in DM of the diet) were distributed in three Latin squares, with nine animals and three periods. Dry matter intake increased as the grain concentration in diet increased; pH showed opposite behavior. Methane emissions were lower for animals fed the diet exclusively with sorghum silage as compared with those fed 30% of concentrate, but was similar to that of animals receiving 60% of concentrate. Losses of ingested gross energy as methane were reduced by 33% when grain concentration was increased in the diet. Concentrations of propionic and butyric acids were greater in diets with grain concentrate; acetic acid concentration was not affected. Concentrate in diet increases available energy for the metabolism, measured by lower losses of ingested gross energy as ruminal methane.