Meat Quality of Nellore Young Bulls—Effects of Different Days on Feed and Zilpaterol Hydrochloride Supplementation
Mariana Caetano,
Rodrigo Silva Goulart,
Saulo Luz Silva,
Sergio Bertelli Pflanzer,
Paulo Roberto Leme,
Antonio Carlos Ramos dos Santos,
Dante Pazzanese Duarte Lanna
Affiliations
Mariana Caetano
Davies Livestock Research Centre, Department of Animal and Veterinary Bioscience, Roseworthy Campus, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia
Rodrigo Silva Goulart
Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil
Saulo Luz Silva
Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil
Sergio Bertelli Pflanzer
Department of Food Technology, Faculty of Food Engineering, Campinas University, Campinas 13083-862, SP, Brazil
Paulo Roberto Leme
Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil
Antonio Carlos Ramos dos Santos
Department of Animal Science, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba 13418-900, SP, Brazil
Dante Pazzanese Duarte Lanna
Department of Animal Science, Luiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba 13418-900, SP, Brazil
Ninety-six Nellore young bulls were fed (90 or 117 day) diets containing ZH (8.33 mg/kg) for 0, 20, 30, or 40 days to evaluate the effects of days on feed (DOF) and length of zilpaterol hydrochloride (ZH) supplementation on meat quality. At the end of feeding period, animals were slaughtered, and samples of the Longissimus muscle were collected to evaluate the chemical composition, fatty acid profile, color stability, shear force, and sensory profile. DOF did not affect chemical composition, shear force, sensory tenderness, and most of fatty acids; however, animals fed for 90 d had lower redness (p p p = 0.03) than those fed for 117 d. The ZH supplementation decreased lipid content and redness (p p p p p p < 0.05). Feeding ZH impairs meat quality attributes of Nellore young bulls, regardless of duration of supplementation, while DOF has a small effect on meat quality properties.
