Growth physiology and meat quality of young cattle finished on pasture or feedlot submitted to different nutritional plans during the stocking phase

• Grant number: 16/10953-3
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): August 01, 2016
• Effective date (End): February 29, 2020
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Principal Investigator: Telma Teresinha Berchielli
• Grantee: Juliana Akamine Torrecilhas
• Home Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil
• Associated scholarship(s): 18/17108-2 - Dietary copper and zinc effects on lipid metabolism in finishing steers, BE.EP.DR

Abstract

This trial aims to evaluate the interactions between processes that contribute with the growth physiology and the mechanisms that act by modifying the meat quality of cattle from different genetic groups (Nelore, ½ Angus x ½ Nelore e ½ Senepol x ½ Nelore) submitted to two nutritional plans in stocker grazing during the rainy season and finished in pasture or feedlot in the dry season. 162 young bulls will be used, with about 250 kg of body average weight. In the stocking phase, the treatments will be divided will be allotted in a 2 x 3 factorial arrangement (two nutritional plans x three genetic groups), the nutritional plans will be: mineral salt and additive in 0.03% of body weight or supplementation in 0.3% of body weight with concentrate. The finishing stocking phase, the animals will be distributed in two finishing system (pasture and feedlot), where everyone will be submitted on each system to the same diet, being daily fed with 2.0% of BW of concentrate. The end experiment, all animals will be slaughtered in the packing plant. The evaluations that will be realized: growth physiology, adipogenesis and expression of genes involved in the deposition of muscle and adipose tissue and meat quality.