Salinomycin and virginiamycin for lactating cows supplemented on pasture

  • Isis Scatolin de Oliveira Federal University of Viçosa; Dept. Animal Science; Universidade Federal de Viçosa
  • Daniel de Paula Sousa Federal University of Mato Grosso; Dept. Basics Sciences and Animal Production; Universidade Federal do Mato Grosso
  • Augusto Cesar de Queiroz Federal University of Viçosa; Dept. Animal Science; Universidade Federal de Viçosa
  • Bruna Gomes Macedo Federal University of Mato Grosso; Dept. Basics Sciences and Animal Production; Universidade Federal do Mato Grosso
  • Camila Garcia Neves Federal University of Mato Grosso; Dept. Basics Sciences and Animal Production; Universidade Federal do Mato Grosso
  • Isabela Eloisa Bianchi Federal University of Mato Grosso; Dept. Basics Sciences and Animal Production; Universidade Federal do Mato Grosso
  • Ronyatta Weich Teobaldo Federal University of Mato Grosso; Dept. Basics Sciences and Animal Production; Universidade Federal do Mato Grosso

Abstract

Animals on pasture generally show higher feed efficiency as a result of the use of antibiotics. This study evaluated the effect of the antimicrobials salinomycin and/or virginiamycin on production and the ruminal parameters of supplemented dairy cows grazing on Panicum maximum cv. Tanzania. Twelve Holstein/Zebu multiparous cows were used, distributed in three Latin squares, one for the evaluation of ruminal parameters, and the others for production parameters. Cows on pasture were fed 50 % of their estimated intake with corn silage and concentrate supplements containing salinomycin, virginiamycin or a combination of additives, in doses of 120 and 150 mg kg−1, respectively. There were no differences in milk production and composition, energy and nitrogen balance, dry matter digestibility and feeding behavior. However, salinomycin and virginiamycin each reduced pasture and total dry matter intake by about 14 % and 10 %, with a consequent improvement in feed efficiency.

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Published
2015-08-01
How to Cite
Oliveira, I., Sousa, D., Queiroz, A., Macedo, B., Neves, C., Bianchi, I., & Teobaldo, R. (2015). Salinomycin and virginiamycin for lactating cows supplemented on pasture . Scientia Agricola, 72(4), 285-290. https://doi.org/10.1590/0103-9016-2013-0401
Section
Animal Science and Pastures