High-fat diet and feedlot performance of bullocks of different genetic groups

• Autor(a) principal: Souza, Andréa Roberto Duarte Lopes
• Data de Publicação: 2010
• Outros Autores: Medeiros, Sérgio Raposo de, Morais, Maria da Graça, Oshiro, Maurílio Massaharu, Júnior, Roberto Augusto de Almeida Torres
• 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/1549
• topic: Bos taurus; Bos indicus; crossbreed; dry matter intake; raw soybean; lipid; Bos taurus; Bos indicus; cruzamento; ingestão de matéria seca; grão de soja; lipídio

This work aimed to evaluate the feedlot performance of bullocks of four distinct genetic groups receiving diets with different levels of fat. Nine Nelore; nine Caracu; ten ½ Caracu ¼ Angus ¼ Nelore and ten ½ Red Angus ¼ Caracu ¼ Nelore bullocks, with a mean initial weight of 227±33 kg and ten months of age, were randomly assigned to two nutritional treatments and fed either with low-fat (3.15% ether extract) or high-fat diet (7.28% ether extract). Dry matter intake (DMI) was quantified during 208 days and the animals were weighed every 28 days. Animals fed with the high-fat and the low-fat diet presented similar results for average daily weight gain (1.511x1.487 kg day-1, respectively) and feed efficiency (194x180 g gain per kg DMI, respectively); the DMI, expressed as live weight percentage, was lower in animals receiving high-fat diet (2.25x2.40, respectively). Crossbred animals presented greater daily weight gain and DMI than Nelore. The high-fat diet can be used in feedlot to improve the performance of ½ Caracu ¼ Angus ¼ Nelore bullocks, since it is efficient in reducing the DMI without compromising weight gain.