THE MILK YIELD PRODUCTIVITY DEPENDING ON LACTATION NUMBER

Abstract

The milk of cows from the first group is better In terms of quality, so in the research, the content of somatic cells and urea in milk of cows from the first group was much less than of older lactation cows.

The lactose content in the milk of cows of the second group was higher in comparison with the first by 1.51%, in comparison with the third by 0.75%. It is known that the more free fatty acids in milk, the more intense the oxidation of milk fat can occur, and as a result, peroxides are formed that cause unpleasant odors and tastes, and thereby deteriorate the organoleptic characteristics of milk. In the research, the highest content of free fatty acids in the milk was recorded in cows of older lactations. Thus, the milk of cows from the third group was characterized by the content of free fatty acids withtin 1.17%, which is 0.58-0.84% higher than that of cows of younger lactations.

Key words: milk yield, the content of quality indicators in milk, the mass fraction of fat.