The effect of feed additives in the Cows diet on the amino acid composition of milk

Animal nutrition, being one of the key elements of the external environment, has a significant impact on the milk productivity of cows, as well as on the composition and technological characteristics of milk. During lactation, it is especially important to provide cows with a balanced intake of vital micronutrients, which play a key role in metabolic processes and the synthesis of dairy components. The Megamix-Optilak complex is a feed premix containing vitamins (A, D3, E, biotin), as well as essential trace elements (copper, zinc, manganese, cobalt, iodine, selenium) and macronutrients (calcium, phosphorus, magnesium), which makes it an effective tool for optimizing the diet and improving productivity cattle. The aim of the work is to study the effect of the feed premix Megamix-Optilak on the dairy productivity of cattle. Scientific and economic experience was conducted in 2022-2023 in the farms of the Chekmagushevsky district of the Republic of Bashkortostan. 4 groups of 20 animals each were formed, selected according to the principle of analogues and kept in the same conditions. The difference in the groups was in feeding: animals of groups I-III additionally received premix Megamix-Optilac in dosages of 100, 150, 200 g/ head per day, whereas the control group did not receive premix. In the course of scientific and economic experience, studies were conducted on the biological value of milk from cows receiving a diet enriched with vitamin and mineral premix. The analysis of the obtained results indicates a positive effect of the studied premix on the protein content in milk (an increase of 2.21-3.48%). The milk protein of the experimental groups was also distinguished by its high biological value, which is confirmed by the analysis of the amino acid composition and the calculation of the amino acid score.