Influence of feeding system on growth performance, carcass characteristics and meat and fat quality of Avileña-Negra Ibérica calves� breed
- Autores: Argimiro Daza Andrada, Ana Isabel Rey Muñoz, Celia López Carrasco, Clemente J. López Bote
- Localización: Spanish journal of agricultural research, ISSN-e 2171-9292, ISSN 1695-971X, Vol. 12, Nº. 2, 2014, págs. 409-418
- Idioma: inglés
- Enlaces
- Dialnet Métricas: 2 Citas
-
Resumen
The effect of feeding system (calves reared under free-range conditions supplemented with concentrate vs. calves fed on concentrate and cereal straw in confinement) during finishing period on growth performance, carcass traits and meat and fat quality was investigated. Fourteen entire males of Avilena-Negra Iberica breed were used. The feeding system had no effect on growth performance, carcass characteristics, muscle colour, drip losses and intramuscular fat (IMF) percentage in Longissimus thoracis. Free-range calves had more content of vitamin E in omental fat and tended (p < 0.1) to have more vitamin E in IMF than calves finished in confinement. C16:0 and C16:1 n-9 proportions in omental fat were higher in calves finished in confinement, while C18:1 n-7, C18:3 n-3, �°n-3 proportions were lower.
The ratio �°polyunsaturated fatty acids (PUFA) to �°saturated fatty acids (SFA) was significantly greater in omental fat from free-range calves. The C14:0, C16:0, C16:1, C17:0, C17:1, C18:1 n-9 and �°monounsaturated fatty acids (MUFA) were higher and C18:3 n-3 and �°n-3 proportions lower in IMF from calves finished in confinement. The ratio C18:1 n-9 to C18:0 was higher in IMF from calves fed on concentrate and straw and the ratio �°PUFA to �°SFA tended (p < 0.1) to be greater in free-range calves. Intramuscular fat percentage affected to fatty acid composition of Longissimus thoracis. Feeding system based in finishing calves in confinement with straw and concentrate can be replaced by supplementation with concentrate in grazing without detrimental effect on quality
