Fatty acids on the performance and immune responses of Nellore feedlot cattle

• Autor(a) principal: Barducci, Robson Sfaciotti
• Data de Publicação: 2015
• Outros Autores: Sarti, Luís Marcelo Nave, Millen, Danilo Domingues, Putarov, Thaila Cristina, Ribeiro, Felipe Azevedo, Franzói, Maria Caroline da Silva, Costa, Carolina Floret da, Martins, Cyntia Ludovico, Arrigoni, Mário De Beni
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/20499
• topic: rumen protected fat; preconditioning; acute phase proteins; Pufa; lipid suplementation; gordura protegida; pré-condicionamento; proteínas de fase aguda; Pufa; suplementação lipídica

The objective of this work was to evaluate the addition of natural and protected lipid sources on the performance and immune responses of Nelore cattle feedlot. A completely randomized design was carried out with repeated measures in time and three treatments, which were: without additional source of lipid (CONTR); with natural lipid source (cottonseed cake) (GDESP); and with rumen protected lipid source, rich in polyunsaturated fatty acids (GPROT). The study was divided into two phases: preconditioning and feedlot of 120 noncastrated Nelore cattle (24 pens, 5 animals per pen, and 8 pens per treatment). The GDESP treatment provided greater weight gain in the preconditioning phase, and, during the feedlot period, there were no differences among treatments for performance, carcass traits, and disease incidence. The highest plasma concentrations of TNFα, IL-1β, haptoglobin, and ceruloplasmin occurred in the CONTR treatment. Lipid supplementation to the diet, regardless of the source, improves the performance and enhances the immunological system of confined Nellore cattle.