Feno de jurema preta (Mimosa tenuiflora (Wild) Poir.) em substituição ao feno de Buffel (Cenchrus ciliaris L.) na porção volumosa da dieta de Cordeiros Santa Inês.

Abstract

This study aimed to evaluate the characteristics of carcass and non carcass constituents of lambs fed different proportions of hay buffel grass (Cenchrus ciliaris L.) and black jurema (Mimosa tenuiflora (Willd.) Poir.). We used 28 lambs, entire, body weight 20 ± 2.49 kg. Diets were formulated to maintain the forage: concentrate ratio of 60:40 and adjusted to meet a gain of 200 g / day. The treatments consisted of different proportions of hay jurema preta (FJP) and buffel grass (FCB) in the bulky portion of the diet: 0% to 100% + FJP FCB, 33% + 67% of FJP FCB, 67% of FJP + 33% of FCB; FJP 100% + 0% FCB. The lambs were slaughtered at 76 days of experiment. After slaughter, recorded the hot carcass weight of digestive contents and not constituents of the carcass. Carcasses remained for 24 hours in a cold room at 4 ° C, and the cold carcass weight and then evaluated the conformation and finish. Using 7 replicates and analyzed completely random, with the data analyzed by regression. Quadratic effect was observed for loin eye area, conformation and chest width. The measures fat thickness and marbling linearly negative, with the replacement of FCB by FJP. It is concluded that for proper onformation, loin eye area and not constituents of the substrate, it is recommended to replace the FCB, the PFJ in proportions of 20 to 50% of the voluminous portion.