Qualidade da carne de cordeiros lactentes suplementados com teores de glicerina bruta em comedouro privativo

Abstract

The objective of this research was to evaluate the effect of crude glycerin in the supplement provided in creep feeding on the physico-chemical and sensory characteristics of meat from suckling lambs kept in pasture ryegrass. Thirty two suckling lambs, sixteen male and sixteen female, were distributed into 4 diets with different concentrations of crude glycerin: 0, 10, 20 and 30% crude glycerin, in the replacement of corn, in the isoproteic supplement (18% CP) provided daily in amounts equivalent to 2% of body weight. The experimental design was randomized blocks, with each variable data submitted to analysis of variance at 5% significance and the significant results subjected to regression analysis. There was no effect (P>0,05) of contents of crude glycerin on the chemical composition and cholesterol content of lamb meat. On the other hand, there was increased linearly (P>0,05) pH and cooking losses by the use of crude glycerin. No influence (P>0,05) of crude glycerin concentration on the texture profile analysis (TPA), sensorial analysis by triangular test and even when was evaluated attributes color, tenderness and juiciness of lamb meat. Up to 30% of crude glycerin in the supplement provided in creep feeding for suckling lambs grazing ryegrass do not compromise the physical-chemical and sensorial quality of the lamb meat.