Effect of Ovoc ap on the reproduction of cows
2008
Petkova, M., Institute of Animal Science, Kostinbrod (Bulgaria) | Kitanov, I., Southwest University, Blagoevgrad (Bulgaria) | Zhelev, K., Executive Agency for Reproduction and Selection in Animal Husbandry, Sofia (Bulgaria)
The reproductive efficiency of Bulgarian cattle has been below the optimum recently, in the transition period. In general, poor feeding post-partum reduces the luteal function and responsiveness of the ovaries to the luteinizing hormone. Animal nutrition could be improved by supplementing with feed additives. This study was conducted to test the effect of feeding the supplemental Bulgarian nutritional additive OVOCAP on the reproductive efficiency in cows. Twelve lactating American Brown cows (BW = 695 ± 28 kg; at the beginning of the lactation) were divided into two treatment groups for 1.2 year. The cows were fed typical diets during the winter (corn silage, meadow hay, straw, wheat bran, brewery pulp, potatoes and compound feed) and summer (pasture, brewery pulp and compound feed). The experimental cows received 2x23 ml OVOCAP in addition to the concentrate part of the daily ration every 28th day post partum, as the first doses were given at 3/4 days post partum. The feed intake was similar in the two groups. Differences were observed for the cows reproductive indexes under the influence of OVOCAP. Overall, intercalving period, open, rest and wasted days were influenced for the better. For optimum reproductive efficiency, it was recommended that cows fed traditional daily rations should be supplemented with OVOCAP.
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