Using cow hair as a mineral metabolism normalization criterion when including environmentally safe lick briquette Amirasol R(C)-Z in the diet

The purpose of research is to study to identify the possibility of using the hairline as a biosubstrate to determine the provision of the body with minerals under the influence of the environmentally friendly lick briquette Amirasol R(S)-Z. A series of scientific and economic experiments was carried out on dairy cows of the Simmental breed. To do this, we selected two groups of cows, control and experimental, 10 animals each. Animals of the control group received a crushed mixture of barley, wheat and mixed grass hay, experimental cows, in addition to the main diet, additionally received a mineral lick-lick Amirasol R(C)-Z, consisting of table salt and salts, macro- and microelements. Briquette weight is 4 kg. To determine the mineral composition of hair in experimental cows, hair samples were taken at the end of the experiment. The content of macroelements K, Na, Mg, Ca was determined on a flame photometer FLAPHO-4 (Germany); Zn, Cu, Se - on a KVANT 2A atomic absorption spectrophotometer with a hydride attachment, I - thiocyanate by the nitride method. Statistical processing of the obtained results was carried out according to the certified computer program "Biometry" and the method of variation statistics. At the end of the experiment, the concentration of potassium, sodium, manganese, calcium and phosphorus in the hair of the experimental group of cows increased by 9.48, respectively; 53.14; 33.33; 22.68; 122.02%; trace elements Fe, Mn, Zn, Cu, Co, Se, I (SBI) - by 89.01; 51.06; 47.45; 132.64; 173.81; 128.16; 178.28 % compared to the control group. The content of mineral substances in the hair in cows of the plain biogeochemical province of Dagestan objectively reflects the body's supply with these elements.