Título:	Effects of antibiotic growth promoters mixed with mineral supplement on growth performance, ingestive behavior, and mineral intake of grazing bulls
Autor(es):	Vedovatto, Marcelo Diogo, José Mauro da Silva Beltrame, João Artêmio Marin D'Oliveira, Marcella Cândia Silva, Cássio José da Mendes, Clayton Quirino Cabral Filho, Sérgio Lúcio Salomon Franco, Gumercindo Loriano
ORCID:	http://orcid.org/0000-0002-9050-6990 http://orcid.org/0000-0002-0685-4416 http://orcid.org/0000-0002-0560-0131 http://orcid.org/0000-0003-4406-4930 http://orcid.org/0000-0001-8558-5586 http://orcid.org/0000-0002-5076-539X http://orcid.org/0000-0003-3458-9135 http://orcid.org/0000-0002-9868-0256
Assunto:	Bovino - alimentação e rações Antibióticos em veterinária
Data de publicação:	2019
Editora:	Sociedade Brasileira de Zootecnia
Referência:	VEDOVATTO, Marcelo et al. Effects of antibiotic growth promoters mixed with mineral supplement on growth performance, ingestive behavior, and mineral intake of grazing bulls. Revista Brasileira de Zootecnia, v. 48, e20190114, 2019. DOI: https://doi.org/10.1590/rbz4820190114. Disponível em: http://scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100706. Acesso em: 23 jan. 2020.
Abstract:	The objective was to evaluate the addition of antibiotic growth promoters to free-choice mineral supplement on ingestive behavior, mineral intake, and growth performance of grazing bulls. Sixty Nellore bulls [initial body weight (BW) of 219±17.8 kg and 15±2 months of age] were divided in 12 marandu grass paddocks. The treatments were: mineral supplement (control), mineral supplement + virginiamycin (VIRG), mineral supplement + lasalocid sodium (LASA) and mineral supplement + salinomycin sodium (SALI). Mineral supplements were formulated with target intake of 60 g d−1 and the growth promoters of 75 mg 100 kg−1 of BW. The experimental design was the completely randomized blocks. There was no treatment effect on ingestive behavior or mineral intake; however, the active ingredient intake differed between treatments. In the last experimental period, the intake of active ingredient LASA and SALI were higher than VIRG (0.66, 0.54, and 0.39 mg kg−1 of BW, respectively). Treatments also did not affect BW and average daily gain, which were 0.63, 0.60, 0.64, and 0.62 kg d−1 for control, VIRG, LASA, and SALI, respectively. Free-choice mineral supplementation intake by bulls has a high variability, and this impairs the regulation of the intake of antibiotic growth promoter additives. Therefore, the addition of antibiotic growth promoters to the mineral supplement does not affect ingestive behavior, mineral intake, and growth performance of grazing bulls.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença:	Copyright: This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. - (CC BY)
DOI:	https://doi.org/10.1590/rbz4820190114
Aparece nas coleções:	Artigos publicados em periódicos e afins

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