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Revista Brasileira de Zootecnia

versão On-line ISSN 1806-9290

Resumo

VENTURINI, Rafael Sanches et al. Characteristics of carcass and of non-carcass components of lambs and hoggets fed high-concentrate corn or sorghum diets. R. Bras. Zootec. [online]. 2017, vol.46, n.3, pp.257-263. ISSN 1806-9290.  http://dx.doi.org/10.1590/s1806-92902017000300011.

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.

Palavras-chave : animal production; feedlot; grain cereal; sheep.

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