Indicators of reproductive function of cows at feeding tanamine zn during the dry period

 The main condition for the intensification of animal husbandry is the acquisition of farms with highly productive animals. High milk productivity of cows is a predisposing factor for the development of metabolic disorders in their body. The search for possible solutions to the problem implies the additional introduction of biologically active substances, when choosing which one should give preference to those that are able to provide the symbiotic micronutrients of the proventriculus with the necessary micronutrients, since the effectiveness of all physiological functions and the  productivity of ruminants depend on its quantitative and qualitative composition. In our opinion, one of the promising directions for solving this problem is the use of feed additives containing plant extracts. The experiment was carried out in the conditions of the SPK "Kolkhoz named after Gorin", Belgorod region on black-and-white cows (Bessonov type). 
We have studied the effect of the use of the drug "Tanamin Zn" on highly productive cows 2 months before the expected calving on the indicators of  reproductive function. From pregnant cows during the start-up period, 2 groups (20 cows in each) were formed with analogues by origin, age, live weight, number of lactations and physiological state.
The cows of both groups were on the basic diet (RR). In addition, before and immediately after calving (twice a month), all animals were injected intraperitoneally with 10.0 ml of the complex vitamin preparation "Tetravit". The  results of the experiment indicate that the daily feeding of cows during the dry period of 20 g of tanamine Zn made it possible to improve the reproductive function of animals. This was reflected in accelerating the process of expulsion of the placenta by 13%, reducing the time for excretion of lochia by two days, reducing the number of cows with postpartum complications, reducing the indiffer- at the age of one month. 

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