Use of increasing levels of extruded concentrate and corn silage in sheep diet

• Autor(a) principal: Rodrigues, Gustavo Roberto Dias
• Data de Publicação: 2021
• Outros Autores: Siqueira, Marco Túlio Santos, Schultz, Erica Beatriz, Oliveira, Karla Alves, Sousa, Luciano Fernandes, Macedo Júnior , Gilberto de Lima
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Caderno de Ciências Agrárias (Online)
• Texto Completo: https://periodicos.ufmg.br/index.php/ccaufmg/article/view/33741
• topic: Extrusão; Ruminantes; Silagem de milho; Ovis aries; Extrusion; Ruminants; Corn silage; Ovis aries; Animal nutrition

The aim was to evaluate the effects of different concentrate: roughage relationships, using extruded concentrate and corn silage, on the intake, digestibility, ingestive behavior, and metabolism of sheep. Twenty Santa Inês ewes with a weight of 50 kg and an average age of three years were used, assigned in a completely randomized design. The evaluated treatments had different concentrate: roughage ratios, using the commercial extruded concentrate Beef Agnus® (B) (Nuttrata Animal Nutrition, Itumbiara-GO, Brazil) and Corn silage (S). The treatments consisted of: 40% Beef Agnus® and 60% Corn silage (40% B: 60% S); 50% Beef Agnus® and 50% Corn silage (50% B: 50% S); 60% Beef Agnus® and 40% Corn silage (60% B: 40% S); 70% Beef Agnus® and 30% Corn silage (70% B: 30% S). The regression analyzes were performed at 5% probability for type I errors. The dry matter intake (DMI), DMI in relation to body weight, DMI in relation to metabolic weight, rumination, and chewing efficiencies showed a negative linear response to increased inclusion of corn silage (P <0.05). Glycemia by harvest time and total proteins showed a quadratic response (P <0.05). Digestibility, urinary and fecal parameters, and energy metabolites were maintained with an reduce in the roughage proportion in the diet (P> 0.05). It is concluded that the use of extruded concentrate promotes the greater intake of the animals and does not cause damage to the ingestive behavior, digestibility, and metabolism of sheep.