Biometric and carcass measurements in Santa Ines lambs fed dehydrated brewery residue

Mayara Silva De Araújo,Patrícia Guimarães Pimentel,Andréa Pereira Pinto,Guilherme Rocha Moreira,Ana Sancha Malveira Batista

doi:10.5935/1806-6690.20210038

Abstract

The aim of this study was to determine biometric measurements in vivo and in the carcass of Santa Ines lambs fed dehydrated brewery residue. Thirty-five Santa Ines lambs were used, approximately 70 days of age and with a mean initial body weight of 16.00±1.69 kg. The experimental design was completely randomised, with five levels of dehydrated brewery residue - DBR (0; 20; 40; 60 and 80%) added to the concentrated portion of the diet, with seven replications. The experimental diets consisted of Tifton-85 hay, soybean meal, ground maize, dehydrated brewery residue in the experimental proportions, dicalcium phosphate and a mineral base. The body condition score, thoracic girth and croup width were not influenced by the experimental diets, neither were the carcass measurements, except for croup circumference, chest width and leg compactness index (P>0.05). However, there was a decreasing linear effect on the carcass compactness index and ribeye area as the DBR was added to the diet. The morphometric measurements of croup height and width, and chest width can be used as an alternative for estimating the body weight at slaughter and the cold-carcass weight of Santa Ines lambs fed dehydrated brewery residue, as they show a high correlation with these variables.

Highlights

Supplementing confined animals with a concentrated diet improves their productive performance and carcass characteristics, as it provides the necessary nutrients to meet the energy and protein demand of the herd during periods of food scarcity, with emphasis on the use of alternative food sources, such as wet brewery residue (SOUZA et al, 2010)
This gives rise to dehydrated brewery residue, which might be characterised as a protein food as it contains, on average, 85% DM and 25% crude protein (CP) (CAVILHÃO et al, 2013), and is a possible alternative and low-cost source for replacing ingredients conventionally used when formulating diets
1Natural matter; 2Dehydrated brewery residue added to the concentrated portion of the diet; 3Ca 24%; P 18%; 4Ca 7.5%; P 3%; Fe 16,500 ppm; Mn 9,750 ppm; Zn 35,000 ppm; I 1,000 ppm; Se 225 ppm; Co 1,000 ppm

Summary

INTRODUCTION

Supplementing confined animals with a concentrated diet improves their productive performance and carcass characteristics, as it provides the necessary nutrients to meet the energy and protein demand of the herd during periods of food scarcity, with emphasis on the use of alternative food sources, such as wet brewery residue (SOUZA et al, 2010). Drying the wet brewery residue, considered a potential pollutant, allows it to be conserved for a longer period. This gives rise to dehydrated brewery residue, which might be characterised as a protein food as it contains, on average, 85% DM and 25% crude protein (CP) (CAVILHÃO et al, 2013), and is a possible alternative and low-cost source for replacing ingredients conventionally used when formulating diets. The aim of this study, was to determine biometric measurements in vivo and in the carcass of Santa Ines lambs fed dehydrated brewery residue in the concentrated portion of the diet, as well as to determine correlations between the measurements

MATERIAL AND METHODS

AND DISCUSSION

Findings

CONCLUSIONS