Nutritional parameters, metabolic and feeding behavior of lambs fed with extruded concentrate

• Autor(a) principal: Oliveira, Karla Alves
• Data de Publicação: 2022
• Outros Autores: Siqueira, Marco Túlio Santos, Vilaça, Lucas Eduardo Gonçalves, Schultz, Érica Beatriz, 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/41411
• topic: Consumo; Digestibilidade; Ração extrusada; Ruminantes; Digestibility; Extruded Feed; Intake; Ruminants

The objective was to evaluate the effect of the use of extruded concentrate levels on nutritional, metabolic parameters and feeding behavior in crossbred Dorper x Santa Inês lambs. Twenty lambs with approximately five months of age were randomly distributed in metabolic cages and fed diets with two roughage:concentrate ratios, 30% roughage and 70% extruded concentrate (30R:70C) or 70% roughage and 30% concentrate. extruded (70R:30C). The roughage used was corn silage and the extruded concentrate was Beef Agnus® (Nutratta Nutrição Animal, Itumbiara-GO, Brazil). A completely randomized design was used with two treatments and ten replications (animal) per treatment. The dry matter intake expressed by body and metabolic weight was higher in animals that received 70% of extruded concentrate. These animals also had shorter ingestion time and longer resting and chewing time. Among the energetic and protein metabolites measured, there was an effect of the extruded concentrate level only on the serum choleste- rol concentration, and the animals that received the highest concentrate level had the highest serum concentration. There was a positive linear relationship between collection time and blood glucose concentration. It is concluded that lambs fed with 70% extruded concentrate and 30% corn silage have higher dry matter intake and reduced chewing time. Also, they manage to keep their energy and protein metabolism under control without the development of liver and kidney dysfunctions.