Influence of vitamin A on intramuscular fat content and fatty acid profile in pigs | Influencia de la vitamina A sobre el contenido en grasa intramuscular y la composición de ácidos grasos en cerdos de cebo
2009
Olivares, A., Universidad Complutense de Madrid (España). Facultad de Veterinaria | Rey, A.I., Universidad Complutense de Madrid (España). Facultad de Veterinaria | Daza, A., Universidad Politécnica de Madrid (España). Escuela Técnica Superior de Ingenieros Agrónomos | Cordero, G., Universidad Complutense de Madrid (España). Facultad de Veterinaria | Sanz, E., Instituto Tecnológico Agrario de Castilla y León, Hontalbilla, Segovia (España). Centro de Pruebas de Porcino | López Bote, C.J., Universidad Complutense de Madrid (España). Facultad de Veterinaria
This experiment was conducted to study the effect of vitamin A concentration in the diet on fatty acid composition and intramuscular fat content. One hundred eight castrated male Large White x (Large White x Landrace) pigs with 56.8 (+/- 1.2) kg live weight were used. Nine replicates (four pigs per pen) were randomly distributed assigned to each of the following treatments: 1,300 IU/kg feed (NRC-VitA) and 13,000 IU/kg feed (10xNRC-VitA) during 11 weeks. The third group was fed with 13,000 IU/kg feed for 6 weeks, and then a diet with 0 IU/kg feed for 5 weeks (10xNRC/0-VitA). The pigs were slaughtered at 126.3 (+/- 2.5) kg live weight. The intramuscular fat percentages were 1,99, 2,09, and 2,51% for the experimental groups 10xNRC-VitA, 10xNRC/0-VitA y NRC-VitA respectively (SEM = 0,07, P<0,07). The reduction of the level of vitamin A in the diet tended to increase C16:0 and C18:0 and increased total saturated fatty acids in subcutaneous backfat. No effect was observed on fatty acid profile of intramuscular fat.
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