Beschreibung:
<jats:p>The early fresh period has a big value in the productive life of animals. The level of management on this time in the farm and the animals’ body state have a correlation with milk production and reproductive efficiency. The purpose of the study was to research the influence of vegeto‐mineral bolus using in early fresh period on the efficiency of the first inseminations of dairy cows. The studies were carried out in one of the breeding farms of the Leningrad region. It was Holstein cows aged from 2 to 7 years. The milk production of cows was 9000 kg. It was two groups (n=80 by each). The cows of the experimental group in the early fresh period received plant‐mineral boluses Metrabol (Techna France Nutrition S.A.S., France). The compound of these boluses includes vitamin E, Mg, Zn, Cu, Se and herbal components (calendula, cinnamun, suisque). It was 2 boluses per animal during the first 12 hours after calving. The protocol of early fresh period of cows (control group) was used the injection of antibacterial, myotonic and multivitamin preparations in the first day of calving. The using of plant‐mineral boluses in the early fresh period had a positive influence on the efficiency of the first inseminations. The high result of first inseminations had cows of experimental group. The difference of values between two groups was 12,8% (first lactation); 1,3% (second lactation); 17,5% (third or more lactation). However, the higher percentage of efficiency after second insemination had cows of control group. The difference of values was 19 % (first lactation); 14,5 % (second lactation) and 15,8% (third or more lactation). More successful third and other inseminations were seen in cows of the experimental group. Thus, the percentage of first lactation’ cows was 6,2%, second lactation – 13,3%, the third and more lactations ‐1,8%. It can be concluded that the using of plant‐mineral boluses during the first 12 hours after calving contributes to a faster recovery of the reproductive system of cows in the postpartum period, which is expressed by a higher efficiency of the first inseminations.</jats:p>