علی اصغر بهاری

The trial was conducted to evaluate the effects of different sources of selenium supplements on blood minerals profile in fattening Mehraban lambs. The trial experiment consisted of 18 lambs, 4-5 months of age and 35.7±2.6 kg average in weight randomly allotted to 3 treatments. Treatments were: 1) Control diet (a diet without selenium, containing 0.06 mg/kg of selenium), 2) Control diet + 0.4 mg/kg Se as selenium yeast (0.4SeY), and 3) Control diet + 0.4 mg/kg Se as sodium selenite (0.4SeS). This trial lasted for 70 days. Blood samples were taken on days 0, 35 and 70. The trials were carried out as a completely randomized design. Organic and inorganic selenium Supplementation did not have significant effect on blood copper, zinc. Iron, calcium and phosphor levels (p>0.05). Although selenium supplementation increased blood GPX activity compared to control group (p<0.05). Overall, It may be concluded that 0.4 mg/kg selenium supplementation as organic and inorganic forms had no significant effects on blood minerals profile in Mehraban lambs. KEYWORDS: Lamb - Selenium - Blood minerals profile