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Effects of nutritional protocols for marbling on meat traits and beef quality of Nellore cattle finished in feedlot

Grant number: 19/26951-8
Support type:Scholarships in Brazil - Master
Effective date (Start): December 01, 2020
Status:Discontinued
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal researcher:Danilo Domingues Millen
Grantee:Luana Doretto Felizari
Home Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil
Associated scholarship(s):21/08116-4 - The effects of Plexomin L-Mn on bovine satellite cell differentiation and GLUT-4 abundance in a cell culture model, BE.EP.MS

Abstract

The objective of this project is to evaluate different nutritional protocols including high-moisture corn, rumen-protected fat, zinc and organic chromium in the diets of feedlot Nellore cattle, ranked by estimated progeny difference (EPD) as high and low marbling on meat quality. In this project, it will be used 132 18-mo-old Nellore bulls (380 kg), which will be blocked by EPD and by initial body weight. Twelve bulls will be slaughtered at day 0 of the study (two per block) for carcass baseline measurements. Therefore, this study will be carried out with 120 Nellore bulls, which will be randomly allocated into 30 pens (n=4 per pen) according to the blocking criteria just described in a 2 × 2 + 1 factorial arrangement of treatments: T1) Finely-ground corn; T2) High-moisture corn; T3) Finely-ground corn + rumen-protected fat; T4) High-moisture corn + rumen-protected fat; T5) High-moisture corn + rumen-protected fat + Zn and Cr. The finishing diets will contain 84% concentrate and 25 ppm of sodium monensin. This study will last 112 days and meat quality variables will be evaluated, such as: proximate composition, color and tenderness, sensory, fatty acid profile, lipid oxidation, satellite cell measurement, loin eye area, subcutaneous fat thickness and marbling. (AU)

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