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Artigo Acesso aberto Produção Nacional Revisado por pares

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Protected or Unprotected Fat Addition for Feedlot Lambs: Feeding Behavior, Carcass Traits, and Meat Quality

2021; Multidisciplinary Digital Publishing Institute; Volume: 11; Issue: 2 Linguagem: Inglês

10.3390/ani11020328

2076-2615

Henry Daniel Ruiz Alba, José Esler de Freitas Júnior, Laudí Cunha Leite, José Augusto Gomes Azevêdo, Stefanie Alvarenga Santos, Douglas dos Santos Pina, Luís Gabriel Alves Cirne, C. S. Rodrigues, Willian P. Silva, Victor Guimarães Oliveira Lima, Manuela Silva Libânio Tosto, Gleidson Giordano Pinto de Carvalho,

Effects of Environmental Stressors on Livestock

This study aimed to evaluate the effect of the inclusion of protected or unprotected fats in the diet of feedlot lambs on feeding behavior, productive characteristics, carcass traits, and meat quality. Forty male Dorper × Santa Inês lambs (22.27 ± 2.79 kg) were randomly assigned to treatments in a completely randomized design. The experimental treatments consisted of five diets: no added fat (NAF), whole soybeans (WSB), calcium salts of fatty acids (CSFA), soybean oil (SO), and corn germ (CG). The total intake of dry matter (DMI) (p < 0.001) and neutral detergent fiber (NDFI) (p = 0.010) were higher in the CSFA and NAF diets. Feeding behavior, morphometric measurements, physicochemical characteristics, and centesimal composition of the Longissimus lumborum muscle were similar between treatments (p > 0.05). The CSFA diet provided higher production (p < 0.05) and better-quality carcasses. The inclusion of fat sources increased the concentration of polyunsaturated fatty acids (p < 0.05). The use of calcium salts of fatty acids in feedlot lambs’ diets provides better quantitative and qualitative characteristics of the meat and carcass.