Short-term use of monensin and tannins as feed additives on digestibility and methanogenesis in cattle.

• Autor(a) principal: PERNA JUNIOR, F.
• Data de Publicação: 2020
• Outros Autores: ZAPATA VÁSQUEZ, D. C., GARDINAL, R., MEYER, P. M., BERNDT, A., FRIGHETTO, R. T. S., DEMARCHI, J. J. A. de A., RODRIGUES, P. H. M.
• Tipo de documento: Artigo
• Idioma: por
• 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/1127774; https://doi.org/10.37496/rbz4920190098
• topic: Gas production; Animal nutrition; Methane; Ruminants

The objective was to assess the effects short-term use of monensin and Acacia mearnsii tannins as feed additives on nutrient intake, digestibility, and CH4 production in cattle. Six rumen-cannulated Holstein cows were distributed in two 3×3 Latin square experimental design, and each experimental period lasted 21 days. The basal diet was composed of corn silage and concentrate in a 50:50 dry matter (DM) basis proportion. Treatments were control, monensin (18 mg kg?1 of DM), and tannin-rich extract from Acacia mearnsii (total tannins equivalent to 6 g kg?1 of DM). Nutrient intake and apparent digestibility coefficients were not affected by the addition of monensin or tannins to diets. However, tannins showed a tendency to reduce crude protein digestibility. Monensin decreased CH4 emission by 25.6% (g kg?1 of body weight) compared with the control treatment. Monensin is more effective than Acacia mearnsii tannins in reducing CH4 emissions in the short term, considering a diet of the same roughage:concentrate proportion for cattle.