Dynamics of microelement contents in the blood of bulls when using the liquid feed additive “Active Mix” VM 10/20

The dynamics of changes in the content of microelements in the blood of bulls (raised up to 15 months of age) using the liquid vitamin and mineral feed additive “Active Mix” VM 10/20 was studied. During its creation, new approaches were used aimed at increasing the bioavailability of microelements and vitamins. The study was conducted on 20 bulls of the Holstein Kholmogory breed, which initially experienced a deficiency of microelements. According to the principle of analogue pairs, the animals were divided into experimental and control groups of 10 animals each. The bulls of the experimental group received the feed additive for 14 months (from the 1st to the 15th month of life). During the 1st month of its use, the general condition of the animals in the experimental group returned to normal, and the content of microelements in the blood significantly increased compared to the control. At the same time, the content of copper, zinc, iron, cobalt and selenium reached the reference intervals. Subsequently, it also increased and remained significantly higher throughout the entire study period.