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Título: Protected fat and variable level of protein in diets of crossbreed cows in early lactation
Título(s) alternativo(s): Gordura protegida e nível variável de proteína em dietas para vacas mestiças no terço inicial da lactação
Palavras-chave: Proteína dietética
Suplementação lipídica
Produção de leite
Bovinos - Lactação
Dietary protein
Lipid supplementation
Milk yield
Bovine - Lactation
Data do documento: Jan-2016
Editor: Universidade Estadual de Maringá
Citação: SOUZA JÚNIOR, A. H. de et al. Protected fat and variable level of protein in diets of crossbreed cows in early lactation. Acta Scientiarum. Animal Sciences, Maringá, v. 38, n. 1, p. 107-112, Jan./Mar. 2016.
Resumo: Current study evaluated the inclusion of protected fat and different levels of crude protein (CP) in the diet of crossbreed cows in early lactation. Twelve cows were distributed in a 4 x 4 factorial design, with four treatments (12 or 16% CP, with or without MEGALAC-E(r)). Statistical analyzes with ANOVA and Pearson's linear correlation procedures were performed. Protected fat did not affect intake of dry matter (DM) and organic matter (OM) (p > 0.05). Increased CP raised consumption of CP and EE and decreased the non-fiber carbohydrates (NFC; p <0.05). Protected fat increased (p <0.05) the digestibility of DM, OM, CP and ashes in the lower protein content. CP increase raised the level of blood and urinary urea (p < 0.05). There was no difference (p > 0.05) on milk yield and composition due to protected fat or CP rates. Since the inclusion of protected fat and higher content of CP (16%) in the diet did not benefit the production and composition of milk in crossbreed cows, diets with 12% CP without the inclusion of protected fat are recommended.
URI: http://repositorio.ufla.br/jspui/handle/1/32782
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