Desempenho e características de carcaça e da carne de ovinos e caprinos suplementados com blocos multinutricionais em pastejo na caatinga.

Abstract

The objective of this study was to evaluate the performance, carcass characteristics and not constituents, the chemical and physical characteristics as well as the fatty acid profile of the meat of sheep and goats grazing in the caatinga, supplemented with multinutrient blocks (MBs). The study was conducted at the Experimental Station EMEPA-PB, in Soledade-PB Brazil. Were used 60 animals (30 sheep and 30 goats) male, uncastrated and average live weight of 18.63 kg. The animals were kept in extensive conditions in an area of caatinga and subjected to three types of supplements: mineral salt; multinutrient blocks (MBs); and MBs + hay buffel. Weight gains are shown higher for animals supplemented with mineral salts, as well as the weight of the and ½ carcass left and the weight of the leg muscles. There was an interaction effect between supplementation and species (P<0.05) for finishing, thickness of subcutaneous fat, pelvic fat, total fat leg and muscle: fat ratio in the tissue composition of the loin, for the variables: other muscles (%), intermuscular fat (g, %), total fat (g, %), bone (%) and M:F and M:B relations. The animals supplemented with BMs had greater (P<0.05) proportion of lipids. While fatty acid profile were no differences between the supplementations in saturated acids: C17 and C18; unsaturated: C17: 1; polyunsaturates C20: 2n6C (P <0.05). Supplementation with multinutrient blocks or together with low quality hay for sheep and goats under rotational grazing in the bush with forage availability and satisfactory quality does not result in significant productivity gains. Sheep and goats supplemented with multinutrient blocks grazing in the savanna get considerable weight and yields of retail cuts, with muscularity and adiposity and quality similar to conventional meat supplementation.