Meat Quality of Nellore Young Bulls-Effects of Different Days on Feed and Zilpaterol Hydrochloride Supplementation

Autor(es)

Caetano, Mariana ^[1] ; Goulart, Rodrigo Silva ^[2] ; Silva, Saulo Luz ^[2] ; Pflanzer, Sergio Bertelli ^[3] ; Leme, Paulo Roberto ^[2] ; Ramos dos Santos, Antonio Carlos ^[4] ; Duarte Lanna, Dante Pazzanese ^[4]

Afiliação do(s) autor(es)

^[1] Univ Adelaide, Davies Livestock Res Ctr, Sch Anim & Vet Sci, Dept Anim & Vet Biosci, Roseworthy Campus, Roseworthy 5371 - Australia

^[2] Univ Sao Paulo, Coll Anim Sci & Food Engn, Dept Anim Sci, BR-13635900 Pirassununga, SP - Brazil

^[3] Campinas Univ, Fac Food Engn, Dept Food Technol, BR-13083862 Campinas, SP - Brazil

^[4] Univ Sao Paulo, Luiz De Queiroz Coll Agr, Dept Anim Sci, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANIMALS; v. 11, n. 9 SEP 2021.
• Citações Web of Science: 0

Resumo

Simple Summary beta-adrenergic agonists have been widely used to improve meat production efficiency and can be a valuable tool for increasing world meat supply. They act as nutrient repartitioning agents, increasing lean tissue deposition but negatively affecting meat quality, notably reducing palatability. While this metabolic modifier improves the growth performance of Zebu breeds, they can impair even more meat quality in feedlot-finished cattle. This study was developed to evaluate the impact of zilpaterol hydrochloride (ZH) feeding duration and time on feed (90 or 117 days), on meat quality, and on composition properties of meat from young Zebu bulls. Supplementing ZH resulted in a leaner and less tender and juicy meat compared to non-supplemented animals, with few differences in fatty acid composition. Feeding animals for 90 or 117 days had a small impact on meat quality attributes. Feeding ZH to Zebu bulls would require additional tenderization practices to reduce the negative effects of ZH on meat quality. 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 < 0.01), sustained juiciness (p < 0.01), and more flavor (p = 0.03) than those fed for 117 d. The ZH supplementation decreased lipid content and redness (p < 0.01), initial and sustained tenderness (p < 0.01), initial and sustained juiciness (p < 0.01), but increased protein (p < 0.01) and shear force (p < 0.01) as compared to non-supplemented animals. The ZH supplementation increased total PUFA, c9,c12-18:2, and 20:4-n6, and decreased c9-20:1 (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. (AU)

• Processo FAPESP: 13/04733-2 - Efeito do tempo de tratamento com zilpaterol e do período de confinamento no desempenho, características de carcaça e qualidade de carne de bovinos Nelore
• Beneficiário: Dante Pazzanese Duarte Lanna
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/14997-4 - Efeitos do período de administração de cloridrato de zilpaterol e do tempo de confinamento no desempenho, características de carcaça e qualidade de carne de bovinos Nelore
• Beneficiário: Antonio Carlos Ramos dos Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado