Title:	Effects of sodium monensin and a tannin–yeast blend on intake, milk yield, and methane emissions in lactating holstein cows.
Authors:	PIUZANA, L. G. TOMICH, T. R. ROTTA, P. P. CARVALHO, D. AMORIM, W. P. F. SILVA, L. H. R. VIEIRA, J. V. F. RIBEIRO, E. F. SILVA, A. L. da
Affiliation:	LETÍCIA GUERRA PIUZANA, UNIVERSIDADE FEDERAL DE VIÇOSA; THIERRY RIBEIRO TOMICH, CNPGL; POLYANA PIZZI ROTTA, UNIVERSIDADE FEDERAL DE VIÇOSA; DAIANE CARVALHO, AMERICAN NUTRIENTS OF BRAZIL; WELLINGTON PAULO FERNANDES AMORIM, UNIVERSIDADE FEDERAL DE VIÇOSA; LUIS HENRIQUE RODRIGUES SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA; JAIMISON VINÍCIUS FERREIRA VIEIRA, UNIVERSIDADE FEDERAL DE VIÇOSA; EMÍLIA FERREIRA RIBEIRO, UNIVERSIDADE FEDERAL DE VIÇOSA; ALEX LOPES DA SILVA, UNIVERSIDADE FEDERAL DE VIÇOSA.
Date Issued:	2026
Citation:	Animals, v. 16, 1345, 2026.
Description:	This study evaluated the effects of sodium monensin or a blend containing condensed tannins and yeast products on intake, digestibility, performance, and methane emissions in lactating Holstein cows. Nine cows (three rumen-fistulated and six non-fistulated) were assigned to three 3 × 3 Latin squares. The treatments were: a control (CON), sodium monensin (MON; 12 mg/kg of dry matter [DM]), condensed Acacia tannins and Saccharomyces cerevisiae yeast blend (SUP; 2 g/kg of DM). The trial lasted 84 days, with three 28-day periods. Neutral detergent fiber (NDF) intake was higher in CON and SUP (p = 0.029). Milk yield, energy-corrected milk, and milk composition did not differ (p > 0.05). The total methane emissions were not affected by treatments (p > 0.05). Methane yield/Kg of DM intake (DMI), organic matter intake (OMI), and digestible OM tended to be lower in SUP (p = 0.091, p = 0.093, p = 0.086). SUP increased the DM, crude protein (CP), and NDF ingestion rates (p = 0.049, p = 0.028, p = 0.013) and decreased the CP rumen pool (p = 0.014). Rumen pH tended to be higher in SUP (p = 0.067). The potentially digestible NDF digestion rate decreased in MON (p = 0.007). Finally, SUP-treated animals showed a tendency to reduce their methane yield relative to DMI, OMI, and digestible OM. Further studies should investigate the long-term impacts of supplementation, rumen microbiome changes, and underlying mechanisms driving methane mitigation.
Thesagro:	Bovino Metano Tanino Aditivo Sódio Produção Leiteira Digestibilidade Ingestão Lactação
Keywords:	Monensina
DOI:	https://doi.org/10.3390/ani16091345
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)