Feno de maniçoba (Manihot pseudoglaziovii Muell Arg.) e palma forrageira (Nopalea cochenillifera Salm Dyck) na dieta de ovinos em crescimento

• Autor(a) principal: MOURA, Marismênia de Siqueira Campos
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRPE
• dARK ID: ark:/57462/0013000007hzm
• Texto Completo: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6899
• topic: Nutrição animal; Palma forrageira; Feno de maniçoba; Ovino; CIENCIAS AGRARIAS::ZOOTECNIA

The aim of the present study was to evaluate the replacement of maniçoba (Manihot pseudoglaziovii Muell Arg.) hay with prickly pear cactus (Nopalea cochenillifera Salm Dyck) (0, 33, 67 and 100%) in the diet of sheep in terms of performance, carcass characteristics, tissue composition of the leg and physicochemicalsensorial properties of the meat. Thirty-two non-castrated mixed breed rams aged seven and eight months with a mean initial weight of 20.8 kg were distributed in a random block design with four treatments and eight repetitions. No significant differences were found regarding the intake of dry matter, organic matter, total carbohydrates or total digestible nutrients (expressed in g/day), for body, warm carcass, cold carcass and meat cut weights, true carcass yields, meat yields, loin eye area, morphometric measures, carcass compactness index, compactness, leg muscularity, color or cooking loss, with the different proportions of hay replacement by cactus (p > 0.05). However, the intake of crude protein, neutral detergent fiber, ether extract, drinking water and food conversion decreased linearly and the intake of non-fibrous carbohydrates, water in the diet, total water, water in relation to % of body weight and water in relation to metabolic weight and dry matter, as well as the subcutaneous fat thickness and yields warm carcass, cold carcass and entrails increased linearly with the inclusion of the cactus. Whereas daily and total weight gains, pH, shearing force, demonstrated a quadratic behavior, with 267.3 g/day, 12.5 kg, 5.66 and 2.11 kgf/cm2 at replacement proportions of 54.81%, 52.67, 36.9% and 59.5%, respectively. No significant differences between treatments were found for sensory attributes, with the exception of flavor and aroma (p > 0.05). Acceptance and intent-to-purchase indices were above 70% and 50%, respectively. The largest weight gains occurred with 53.7% prickly pear cactus and 46.3% maniçoba hay in the sheep diet. In conclusion, prickly pear cactus replaces maniçoba hay up to 100% in the diet of sheep without affecting the main characteristics of the carcass, meat cuts, sensory quality and acceptance of the meat and allows improved yields of the carcass and entrais.