Glicerina bruta oriunda da agroindústria do biodiesel na alimentação de cordeiros em terminação

• Autor(a) principal: Lage, Josiane Fonseca
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5616
• topic: Ovinos; Confinamento; Resíduos; Sheep; Containment; Waste; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMAL

The present thesis was elaborated for aim to evaluate the effects of including crude glycerin (CG) on finishing lambs diets on intake, nutrients digestibility, performance, economical analysis, traits carcass, quality and safe of meat lambs. Thirty five intact male lambs (Santa Inês), with 20±2,27 kg of initial body weight, were randomly assigned to five treatments, with six replicates, consisted of increasing crude glycerin levels on the diet: 0, 3, 6, 9 and 12% of diet dry matter. After ten days of adaptation, five animals were slaughtered to determine initial carcass dressing and then estimate initial carcass weight, which was used to obtain carcass gain (CG), expressed in kg/day or in percentage to average daily gain (CG/ADG). After period adaptation, the thirty animals were housed an individual pens and received the diets with 30% of roughage and 70% of concentrate. When the group reached average body weight of 35 kg, the animals were slaughtered. The intake of dry matter (DM), g/day and g/kg of body weight, organic matter (OM), g/day and g/kg of body weight, crude protein (CP), neutral fiber detergent (NFD), g/day and g/kg of body weight, non-fibrous carbohydrates (NFC) and total digestible nutrients decrease linearly as the level crude glycerin in the diet (P<0,05). The intake of ether extract had a quadratic effect (P<0,05), estimating at the level of 10,78% CG, the maximum intake of 57,62 g/day. Differences no were detected (P>0,05) on digestibility of DM, OM and CP. The digestibility NFD had a effect quadratic (P<0,05), estimating at the level 7,30% of CG, the minimum digestibility on 38,44%. The digestibility of ether extract decrease linearly and the digestibility of NCF increase linearly with the inclusion of CG in the diet (P<0,05). The body weight at slaughter, the empty body weight and feed to gain ratio had a quadratic effect (P<0,05). The empty body weight in relation body weight at slaughter, empty body weight gain, carcass gain (CG), carcass gain relation average daily gain (CG/ADG) and average daily gain (ADG) decrease linearly (P<0,05) as the level CG in the diet. The hot carcass weight and coldhad a quadratic effect (P<0,05) and the hot dressing percentage on shrunk and the empty body weight, cold dressing percentage on shrunk and the empty body weight decrease linearly as the level CG in the diet (P<0,05). Differences no were detected on cooling losses and backfat thickness (P>0,05), but the ribeye area had a quadratic effect (P<0,05). Differences no were detected (P>0,05) on main carcass cuts and neck weight, but the shoulder and rib weight decrease linearly (P<0,05) as the level CG in the diet. The loin and leg weight had a quadratic effect (P<0,05). The empty body weight had a quadratic effect (P<0,05). Differences no were detected (P>0,05) on yield non carcass tissue components: organs, diaphragm, visceral fat, intern fat, reproductive tract and trachea, feet, head and blood. The yield of stomach and intestine had a quadratic effect (P<0,05) but the fur yield decrease linearly as the level CG in the diet (P<0,05). The thaw losses had a quadratic effect (P<0,05), but differences no were detected on initial and final pH, cooking losses, total losses and shear force of Longissimus dorsi muscle (P>0,05). Differences no were detected (P>0,05) on moisture, ash and ether extract content of meat lambs, but the crude protein content decrease linearly (P<0,05) as the level CG in the diet. The copper content on liver lambs increase linearly (P<0,05) as the level CG in the diet, but the zinc content decrease linearly as the level CG in the diet (P<0,05). The crude glycerin with 36,20% of glycerol could included in the diet of finishing lambs in 6% of dry matter, optimizing the feed to gain ratio. If the price crude glycerin reach until 70% of corn price, could included on the finishing diet lambs until 6% on the diet dry matter, promoting economics benefits. The inclusion crude glycerin on the finishing diets lambs no promote changes that promise the quality and safe meat.