R. Bras. Zootec.. 01/Mar/2017;46(3):257-63.

Characteristics of carcass and of non-carcass components of lambs and hoggets fed high-concentrate corn or sorghum diets

Rafael Sanches Venturini, Sérgio Carvalho, Paulo Santana Pacheco, Ana Carolina Ribeiro Sanquetta de Pellegrin, Andressa Ana Martins, Jusecléia Ferreira Lopes, Anderson Bortoluzzi Moro, Robson Rodrigues Simões

DOI: 10.1590/S1806-92902017000300011

ABSTRACT

The objective of this study was to evaluate the characteristics of carcass and non-carcass components of lambs and hoggets finished in the feedlot with high-concentrate corn or sorghum grain-based diets. Thirty-two animals were finished, comprising 16 lambs (milk teeth) and 16 hoggets (two teeth), which were distributed in a completely randomized design in a 2 × 2 factorial arrangement (two sheep categories × two grains). For the variables final live weight, live weight at slaughter, hot carcass weight, cold carcass weight, hot carcass yield, cold carcass yield, carcass compactness index, subjective color, loin-eye area, fasting losses, external organs, internal organs, and for the weights, in kilograms, of neck, shoulder, ribs, and leg, there was a significant difference between categories. In the variables studied for the high-concentrate diets, significant differences were found for the ribs, expressed in relative values. Lambs have much higher fasting losses, a greater proportion of internal organs, and lighter-colored meat compared with hoggets. Hot and cold carcass yields, meat subjective color, and percentage of ribs are higher in feedlot-finished lambs and hoggets fed high-concentrate sorghum-based diets compared with those fed corn-based diets.

Characteristics of carcass and of non-carcass components of lambs and hoggets fed high-concentrate corn or sorghum diets

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