Estimating real time individual lysine and threonine requirements in precision-fed pigs
Nenhuma Miniatura disponível
Data
2019-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wageningen Acad Publ
Tipo
Trabalho apresentado em evento
Direito de acesso
Resumo
This study aimed to estimate independently real-time lysine (Lys) and threonine (Thr) requirements in growing-finishing pigs. Ninety-five pigs were randomly assigned to treatments according to 2x5 factorial arrangement with 2 amino acids (AA; Lys, and Thr) and 5 levels of incorporation (60, 80, 100, 120 and 140% of the estimated requirements) as main factors. Lysine and Thr requirements were estimated daily in real time during a 21-day trial. Data was analyzed using LOESS regression and the surface response methodology. The point of maximum response was obtained through a canonical analysis of the adjusted response surface and was found to be saddle-shaped, possibly due to the variability within AA requirements among individual pigs and thus pointed for several possible optimal Thr/Lys combinations. In conclusion, the non-unique response of the regression model indicates that there is a large between-animal variation in protein deposition (PD) response to Lys and Thr supply.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Energy And Protein Metabolism And Nutrition. Wageningen: Wageningen Acad Publ, v. 138, p. 451-452, 2019.