Does virginiamycin supplementation affect the metabolism and performance of Nellore bulls grazing under low and high gain rates?

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dc.contributor.authorCosta, João Paulo R. [UNESP]
dc.contributor.authorDe Jesus, Raphael B. [UNESP]
dc.contributor.authorOliveira, Ivanna M. [UNESP]
dc.contributor.authorResende, Flávio D. [UNESP]
dc.contributor.authorSiqueira, Gustavo R. [UNESP]
dc.contributor.authorMalheiros, Euclides B. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAPTA - Agência Paulista de Tecnologia dos Agronegócios
dc.date.accessioned2019-10-06T15:19:30Z
dc.date.available2019-10-06T15:19:30Z
dc.date.issued2018-10-01
dc.description.abstractThis study aimed to evaluate the effect of virginiamycin on the metabolism and performance of growing Nellore bulls under low and high gain rates on pasture. In experiment 1, 80 Nellore bulls (age = 12 ± 2 months, body weight = 258 ± 15 kg) were assigned to 16 paddocks in a 2 × 2 randomized block factorial arrangement. In experiment 2, 12 cannulated Nellore bulls were assigned to three 4 × 4 balanced Latin squares. The factors were: (1) mineral salt without or with virginiamycin, and (2) low or high gain rate. No interaction was noted between factors (p >.10). Animals fed virginiamycin had greater average daily gain (14%, p <.01), body weight (11 kg, p =.05), plasma nonesterified fatty acid (20%, p <.01), serum calcium concentration (2.62%, p =.04), and total protozoa (p =.03) and had the same bacterial proportion (p >.27). Animals with a low gain rate had greater serum urea concentration (19.6%, p <.01) and ruminal ammonia nitrogen (62%, p <.01). Thus, virginiamycin increases the performance and changes the metabolism of growing Nellore bulls under low and high gain rates on pasture.en
dc.description.affiliationDepartment of Animal Science UNESP - Univ. Estadual Paulista
dc.description.affiliationDepartment of Animal Science APTA - Agência Paulista de Tecnologia dos Agronegócios
dc.description.affiliationUnespDepartment of Animal Science UNESP - Univ. Estadual Paulista
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: #2012/21664-5
dc.description.sponsorshipIdFAPESP: #2013/10340-3
dc.description.sponsorshipIdFAPESP: #2016/01961-2
dc.format.extent1432-1441
dc.identifierhttp://dx.doi.org/10.1111/asj.13052
dc.identifier.citationAnimal Science Journal, v. 89, n. 10, p. 1432-1441, 2018.
dc.identifier.doi10.1111/asj.13052
dc.identifier.issn1740-0929
dc.identifier.issn1344-3941
dc.identifier.scopus2-s2.0-85054192594
dc.identifier.urihttp://hdl.handle.net/11449/186909
dc.language.isoeng
dc.relation.ispartofAnimal Science Journal
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectadditive
dc.subjectruminal parameters
dc.subjectsupplementation
dc.subjecttropical pasture
dc.titleDoes virginiamycin supplementation affect the metabolism and performance of Nellore bulls grazing under low and high gain rates?en
dc.typeArtigo
unesp.author.orcid0000-0003-4054-1410[3]

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