Effect of different Se diets on blood SE,TAC levels in dairy cattle and their newborn calves

Free radicals can be produced during the respiratory oxidation of different cells. These free radicals can damage to various macromolecules as protein, fat, nucleic acids and … are harmful for body. The natural defence system that can prevent the damage of free radicals and nuteralized them, have tittled under the name total antioxidant capacity (TAC). Se is one main antioxidant part in TAC, because it is one main part in structure of some body antioxidant enzymes. Blood se and TAC probably can change by feeding of different selenium supplement diet in late pregnancy and also may transport from maternal blood to its fetus or by clostrum after calving. In this respect we have determined 90 pregnant dairy cattle (in the same condition of age and number of parturient) and feed them in 3 last pregnancy months by different selenium diets. Then measured blood se and TAC levels in them and in 3 days newborn calves after calving. The results were analysed by tukey anova test and the highest level of blood se and TAC was shown in cattle that feed fermented se diet and in their 3 days newborn calves.