Effect of injectable vitamin and trace element administrations during transition period on fertility in Brown Swiss dairy cows

This study examined the effects of injectable vitamin and trace element combination during transition period on clinical-biochemical parameters reproductive performance in Brown Swiss dairy cows. Sixty multiparous cows were randomly allocated two groups as element-vitamin treated (n=30) control (n=30). Animals received four injections at beginning dry period, 21 days before parturition, day postpartum 30±5 days. Energy, protein, hepatic metabolism markers, blood mineral levels concentrations measured -7±4 antepartum, 3±2 days, postpartum. Genital tract examinations performed Treated showed lower glucose, total urea, greater NEFA concentration relative to calving. Effect serum calcium phosphorus significant. The pregnancy rate was 95.8% 59.09%, treatment respectively 150 (P<0.05). In conclusion, supplementation increased significantly positively affected energy, ion metabolism, function.