Daza A, Mateos A, Rey A I, Ovejero I, López-Bote C J
Departamento de Producción Animal, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica, 28040 Madrid, Spain.
Meat Sci. 2007 Jul;76(3):411-6. doi: 10.1016/j.meatsci.2006.10.004. Epub 2007 Apr 6.
This experiment was undertaken to provide information on the effect of feeding system applied during the finishing period (100-150kg) on the quality of Iberian pig meat. Four feeding systems were applied: pigs fed under free-range conditions with acorns and grass fully available during 111 days (FR(111)), pigs fed concentrate diet in confinement during 28 days and free-range with acorns and grass fully available during 83 days (CDC(28)+FR(83)), pigs fed concentrate diet in confinement during 65 days and free-range with acorns and grass fully available during 46 days (CDC(65)+FR(46)) and pigs fed concentrate diet in confinement with a feed average daily amount of 3.1kg during 111 days (CDC(111)). The CDC(111) pigs had more muscular carcasses characteristics than the remaining groups of pigs. However, the higher concentration of C18:1 n-9 in subcutaneous backfat was found in FR(111) pigs. In the neutral lipids from intramuscular fat of Longissimus dorsi only the C18:2 n-6 and C18:3 n-3 proportions were affected by feeding system, and the n-6/n-3 ratio observed was lower in FR(111) and CDC(28)+FR(83) pigs than in CDC(111) pigs. In the neutral lipids from hepatic fat the proportion of n-6 fatty acids was lower in FR(111) pigs than in CDC(65)+FR(46) and CDC(111) pigs.
本实验旨在提供育肥期（100 - 150千克）所采用的饲养系统对伊比利亚猪肉品质影响的相关信息。采用了四种饲养系统：猪在自由放养条件下，111天内可完全获取橡子和青草（FR(111)）；猪先在圈养条件下饲喂浓缩饲料28天，然后在自由放养条件下，83天内可完全获取橡子和青草（CDC(28)+FR(83)）；猪在圈养条件下饲喂浓缩饲料65天，然后在自由放养条件下，46天内可完全获取橡子和青草（CDC(65)+FR(46)）；以及猪在圈养条件下，111天内平均每日饲喂3.1千克浓缩饲料（CDC(111)）。与其他猪组相比，CDC(111)组猪的胴体肌肉特征更明显。然而，FR(111)组猪皮下背膘中C18:1 n - 9的浓度更高。在背最长肌肌内脂肪的中性脂质中，只有C18:2 n - 6和C18:3 n - 3的比例受饲养系统影响，且FR(111)组和CDC(28)+FR(83)组猪的n - 6/n - 3比值低于CDC(111)组猪。在肝脏脂肪的中性脂质中，FR(111)组猪的n - 6脂肪酸比例低于CDC(65)+FR(46)组和CDC(111)组猪。
