Analysis of the influence of feeding on the change in the mineral composition of blood of the cattle of different physiological groups when intensifying production

Abstract

Abstract The article presents the results of the analysis and substantiation of changes in the mineral composition of the blood serum of cows of different technological groups and physiological state. It was revealed that the level of zinc in the blood of all studied animals was lower than the normative indicator. Cows with relatively high productivity (8,000 kg of milk and above) also had a lack of potassium, and cows of the 3rd lactation and older had a lack of magnesium. In addition, an increased content of phosphorus and chlorides in the blood serum of almost all studied animals was revealed.