Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain.
Meat Sci. 2010 Jun;85(2):235-9. doi: 10.1016/j.meatsci.2010.01.004. Epub 2010 Jan 13.
The present study was conducted to determinate the responsiveness of different levels of dietary conjugated linoleic acid (CLA) on intramuscular fat (IMF) and fatty acid composition of skeletal muscle and fat in pigs fed from 59.5 to 133.5kg. Forty female Large Whitex(Large WhitexLandrace) pigs were used. Four levels (0%, 0.5%, 1% and 2%) of a commercial enriched CLA oil supplementation (60% of CLA isomers, 30% cis-9, trans-11 and 30% trans-10, cis-12) were fed to pigs. Carcass, ham, foreleg and loin weights were recorded. Dietary CLA enrichment increased the loin weight (P<0.01) and the combined weights of hams+forelegs+loins (P<0.02). IMF content in Longissimus dorsi was also increased by dietary CLA treatment (P<0.001) and a linear response was observed. Dietary CLA increased saturated fatty acids (SFA) and decreased monounsaturated fatty acids (MUFA) in muscle and adipose tissue (P<0.001). Feeding 1% CLA to finishing swine increases IMF in heavy pigs slaughtered at an average weight of 133.5kg.
本研究旨在确定不同水平的日粮共轭亚油酸（CLA）对 59.5 至 133.5kg 生长猪肌肉内脂肪（IMF）和脂肪酸组成的反应。选用 40 头雌性大白猪（大白猪×长白猪）。日粮中添加 0%、0.5%、1%和 2%（CLA 异构体 60%，顺 9，反 11 为 30%，反 10，顺 12 为 30%）的商业化富 CLA 油。记录胴体、火腿、前腿和腰肉重量。日粮 CLA 富集增加了腰肉重量（P<0.01）和火腿+前腿+腰肉的组合重量（P<0.02）。日粮 CLA 处理还增加了背最长肌的 IMF 含量（P<0.001），呈线性反应。日粮 CLA 增加了肌肉和脂肪组织中的饱和脂肪酸（SFA），减少了单不饱和脂肪酸（MUFA）（P<0.001）。在肥育猪日粮中添加 1%的 CLA 可以增加平均体重为 133.5kg 的肥猪的 IMF。
