Leguminosa ou concentrado na terminação de cordeiros lactentes em pastejo de azevém

• Main Author: Pellegrin, Ana Carolina Ribeiro Sanquetta de
• Publication Date: 2016
• Format: Doctoral thesis
• Language: por
• Source: Manancial - Repositório Digital da UFSM
• dARK ID: ark:/26339/001300000tp7d
• Download full: http://repositorio.ufsm.br/handle/1/4383
• topic: Carcaça; Carne; Creep feeding; Creep grazing; Trevo branco; Carcass; Creep feeding; Creep grazing; Meat; White clover; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA

The objective of this research was to evaluate the effect of private supplementation with concentrated or legume, on the pasture characteristics, performance, carcass traits, body components, physico-chemical and sensory characteristics of the meat from suckling lambs kept on ryegrass pasture. Twenty seven suckling lambs were used with about 17 days of age and weighing 9,91 ± 0,594kg, which are distributed in the treatments that corresponded to feeding systems: suckling lambs kept on ryegrass pasture, suckling lambs kept on ryegrass pasture and supplemented with concentrated in private feeder (creep feeding) and suckling lambs kept on ryegrass pasture and supplemented with legume in the private pasture (creep grazing). The concentrate supplement was composed by corn, soybean meal and limestone, and was supplied ad libitum. The supplementary pasture was composed by legume white clover. It was evaluated the characteristics of ryegrass pasture and performance of lambs, which were slaughtered when reached 32 kg of body weight. Subsequently, evaluated the carcass characteristics, body components and characteristics of meat. The experimental design was completely randomized, where the results were submitted to analysis of variance and means compared by Tukey test at 5% of significance level. Supplementation, through concentrated or legumes, did not increase the performance of suckling lambs grazing ryegrass, despite differences in neutral detergent fiber and acid detergent fiber by consumed pasture from animals that were smaller for the supplemented with legume. Suckling lambs kept in ryegrass produce similar carcasses of animals receiving supplement, despite gastrointestinal tract content with bile and urine and the proportion of the esophagus be higher (P<0,05) in lambs maintained in ryegrass and not supplemented and proportions of liver and intestine are higher (P<0,05) in lambs supplemented with concentrate. The color of the meat of was affected (P<0,05) by feeding system, being less opaque and red but more yellow the meat from not supplemented lambs. The tocopherol and cholesterol levels were higher (P<0,05) in meat of lambs not supplemented as well as lower contents of ash (P<0,05) were found in the meat of these animals. The water hold capacity was lower (P<0,05) in meat from animals supplemented with concentrate. Most intense characteristic flavor (P<0,05) was observed in meat from lambs who consumed concentrated; and more tender (P<0,05) was the meat of suckling lambs supplemented with legume. The use of white clover legume as supplementary private pasture provides rapid finishing of lambs with carcass and meat with quality, which makes this feeding system an option to finishing lambs.