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Effects of zilpaterol hydrochloride feeding time and feedlot days on performance, carcass characteristics and meat quality of Nellore bulls

Grant number: 12/14997-4
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): January 01, 2013
Effective date (End): February 28, 2014
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Production
Principal Investigator:Dante Pazzanese Duarte Lanna
Grantee:Antonio Carlos Ramos dos Santos
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil


Zilpaterol hydrochloride (ZH) has been used in the United States of America, Canada, Mexico and South Africa as performance enhancing additive in cattle feedlot finishing. Several studies have shown that the use of this synthetic compound belonging to the group of beta-adrenergic agonists provides improvement in average daily gain, feed efficiency, carcass weight, carcass yield and yield of boneless meat. It also showed that this compound decreases the sensory tenderness score and the juiciness score of sirloin, besides providing a tendency to increase the perception of connective tissue. Although there are several studies in the literature, Brazilian termination farms have special characteristics that were not considered in previous studies, which could alter the responses of the ZH. One feature is the predominance of Bos indicus animals and, in particular, Nellore. Another typical occurrence in Brazilian termination farms is the prevalence of bovine uncastrated. In addition, the feedlot period are shorter than those used in previous work. In this sense, the objective of this study is to evaluate the effects of ZH feeding time and feedlot days on performance, carcass characteristics, commercial cuts yield and meat quality of Nellore bulls.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CAETANO, MARIANA; GOULART, RODRIGO S.; SILVA, SAULO L.; LEME, PAULO R.; PFLANZER, SERGIO B.; DOS SANTOS, ANTONIO C. R.; LANNA, DANTE P. D.. Effects of the Duration of Zilpaterol Hydrochloride Supplementation and Days on Feed on Performance, Carcass Traits and Saleable Meat Yield of Nellore Bulls. ANIMALS, v. 11, n. 8, . (13/04733-2, 12/14997-4)
CAETANO, MARIANA; GOULART, RODRIGO SILVA; SILVA, SAULO LUZ; PFLANZER, SERGIO BERTELLI; LEME, PAULO ROBERTO; RAMOS DOS SANTOS, ANTONIO CARLOS; DUARTE LANNA, DANTE PAZZANESE. Meat Quality of Nellore Young Bulls-Effects of Different Days on Feed and Zilpaterol Hydrochloride Supplementation. ANIMALS, v. 11, n. 9, . (13/04733-2, 12/14997-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SANTOS, Antonio Carlos Ramos dos. Effects of zilpaterol hydrochloride feeding time and feedlot days on performance, carcass characteristics and meat quality of Nellore bulls. 2015. Master's Dissertation - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.

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