Use of virginiamycin and salinomycin in the diet of beef cattle reared under grazing during the rainy season: performance and ruminal metabolism
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Data
2019
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Editor
Luiz Augusto Batista Brito
Resumo
The rumen is the most studied organ with regard to the symbiotic interaction between host and
microbiota in the digestive tract of ruminants. Thus, this study aimed at evaluating the effects of
including virginiamycin and salinomycin to the supplement for cattle fed tropical grass diet during
the rainy season. Three treatments were set: control – mineral supplement COMIGO - Cria 61-F2
(MS); virginiamycin – MS + virginiamycin (Phigrow ®) 100 mg/animal/day; salinomycin – MS +
salinomycin (Posistac®) 108 mg/animal/day for the experiment 1 (performance) and experiment 2
(ruminal metabolism). The control showed higher Mineral supplement intake (MSI) (P <0.05), the
virginiamycin had higher average daily gain (ADG) (P> 0.05) and better financial efficiency.
Biometric measurements showed no differences (P> 0.05), suggesting a change in the ADG
composition. There was no difference (P> 0.05) for dry matter digestibility (DMDIS), acid detergent
fiber digestibility (ADFDIS), ruminal pH and ammoniacal-N. The virginiamycin had the highest
effective neutral detergent fiber (NDF) degradability (P> 0.05) in the passage rates of 2 and 5%; the
degradability rates were similar to control treatement and higher than that of salinomycin at the rate
of 8%/hour. The virginiamycin or salinomycin can be conveyed to the MS, but do not promote
significant effects on ruminal pH, ammoniacal-N, DMDIS and ADFDIS; but virginiamycin promoted
greater effective degradability of NDF.
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Palavras-chave
Ammoniacal-N, Antimicrobials, Degradability, Growth, Ruminal pH, Antimicrobianos, Degradabilidade, Crescimento, pH ruminal, N-amoniacal
Citação
FERREIRA, Sérgio Fernandes; FERNANDES, Juliano José de Resende; PÁDUA, João Teodoro; BILEGO, Ubirajara Oliveira; FREITAS NETO, Marcondes Dias de; FURTADO, Rodrigo Gomes. Use of virginiamycin and salinomycin in the diet of beef cattle reared under grazing during the rainy season: performance and ruminal metabolism. Ciência Animal Brasileira, Goiânia, v. 20, e26867, 2019.