Metabolomic characterization of meat from Angus x Nelore cattle fed on grazing and confinement with two growth rates

• Grant number: 18/23747-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2019
• End date: December 31, 2019
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Saulo da Luz e Silva
• Grantee: Rafael Tercino Matsushima
• Host Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil

Abstract

The objective of this work is to evaluate the system effect of the finishing system, the rate of weight gain in metabolites meat profile of castrated males Angus x Nelore. The experiment is being carried out using a completely randomized design in a 2 x 2 factorial arrangement with two finishing systems (pasture and confinement) and two rates of weight gain (high and low) in which all animals will be slaughtered at 540 kg live weight. A total of 36 Angus x Nelore castrated males with an average initial weight of 330±30 kg and 12 months os age, of which 18 animals were housed in an experimental confinement and 18 animals were allocated in grass paddocks containing Brachiara brizantha cv. Marandu. In each finishing, the system was defined two distinct weight gain rates, that 9 animals of finishing system confinement with a high rate of weight gain (average 1,5 kg/day), 9 animals of finishing system confinement with a low rate of weight gain (average 1,0 kg/day), 9 animals of finishing system pasture with a high rate of weight gain (average 1,0 kg/day), 9 animals of finishing system pasture with a low rate of weight gain (average 0,6 kg/day). After slaughter, the metabolic profile will be evaluated.