CHANGES IN MILK PRODUCTIVITY AND ITS QUALITY DEPENDING ON AIR TEMPERATURE IN COWS OF DIFFERENT BREEDS

Abstract

The article presents research materials of high temperature and solar insolation on the quantitative and qualitative composition of milk in black-and-white and Bushuy cattle breeds. The study data showed that high air temperature and solar radiation have a significant negative effect on metabolic processes in the body of animals, as a result of which their physiological state deteriorates, the biochemical components of the blood change, accompanied by a decrease in the productivity of cows and the nutritional value of their milk. The results of the study indicate the need to keep lactating cows during the hot time of the day under a canopy, in well-ventilated rooms, which are an important positive factor affecting the physiological state of the body, productivity and nutritional value of milk.