The effect of diet supplementation with Se, Zn and vitamin E on cholesterol, CLA and fatty acid contents of meat and liver of lambs

摘要

The study was conducted on 20 Polish Merino ram-lambs divided into two groups: experimental (E) and control (C), each of 10 animals. From birth all the lambs were maintained with their dams and then weaned at the age of 8 weeks, placed in individual straw-bedded pens and fattened individually with a granulated concentrate mixture until reaching a mean body weight of 31.8 kg. During fattening each lamb from group E was given per os 1 ml 0.1% Na2SeO4, 3 ml 10% ZnSO4 and 60 mg vitamin E (α-tocopherol) daily. The concentrations of conjugated linoleic acid (% of the fatty acid sum) in meat (0.45%) and in liver (1.21%) were higher (P<0.05) while cholesterol content (42.8 mg/100g fresh matter) lower (P<0.05) in E than in C lambs. In group E total cholesterol of blood plasma decreased and HDL fraction level increased. The dietary supplementation of Se, Zn and vitamin E improved the lipid profile of lambs’ meat.