CHANGES IN THE MINERAL COMPOSITION OF COW'S MILK UNDER THE LICK BRIQUETTES INFLUENCE

Abstract

The aim of the study is to investigate the degree of influence of environmentally friendly lick briquettes Amirasol G(S)-Z and Amirasol G(S)-L on the mineral composition of milk, milk productivity and milk fat content of Caucasian brown cows of the mountain biogeochemical province of the Republic of Dagestan in the autumn-winter and spring-summer periods of keeping. During the use of lick briquettes in the diets of cows during the year, their positive effect on the mineral composition of milk, milk productivity and milk fat content was revealed. Moreover, a reliable increase was established in the milk of the experimental group of cows in the concentration of macroelements potassium, sodium, magnesium, calcium, phosphorus, respectively, by 12.17; 155.10; 52.82; 46.18; 93.96 %; microelements iron, zinc, manganese, copper, cobalt, iodine (CBI), selenium, respectively, by 101.84; 113.96; 256.01; 130.47; 265.85; 530.0; 275.91 % compared to the control group, compared to the average level of the physiological norm – by 19.66; 39.70; 5.84; 82.12; 92.96; 98.94; 83.17; 80.11; 94.08; 47.67; 210.89;109.73 %. In the control group of cows, the concentration of macro- and microelements was below the lower limit of the norm, with the exception of potassium and manganese, which were higher by 29.01 and 10.04 %, respectively, compared to the lower limit of the physiological norm. The use of lick briquettes in the diets of dairy cows during the year also contributed to an increase in milk productivity by 6.23 %, milk fat content by 5.0 % (0.20 abs.%), an additional 0.49 liters of milk per head per day were obtained on average for the group. The economic effect was 80,460 rubles, or 2,682 rubles per head during the experiment.