DAIRY PRODUCTIVITY OF COWS OF THE SIMMENTAL BREED DIFFERENT LINES
The article deals with the issues of milk productivity and milk quality of Simmental cows of Austrian breeding. The experiment was conducted on three groups of cows with 15 heads each. The first group contained cows of the Romulus line, the second - Honiga, and the third - Redada. It was found that the animals of the Romulus line had a higher milk productivity. In comparison with the animals of the Honiga line, their milk yield is higher by 205 kg (3.1%) and by 310 kg (4.6%) than that of Redada cows. The fat content in milk is also higher in animals of the first group (Romulus line) in comparison with other groups. The protein content in the milk of experimental animals varies slightly. The amount of casein is greater by 0.07-0.08% in the animals of the first experimental group. The presence of lactose was in the range of 4.79-4.76%, no changes in this indicator were found between the groups. In dry matter, the highest fat content was observed in animals of the Romulus line. The number of somatic cells in milk was 172-184 thousand/cm3 in groups. According to the standard, the excess should not be more than 200 thousand/cm3 for premium milk. The presence of mesophilic aerobic and facultative anaerobic microorganisms in milk was at the level of GOST requirements. The energy value of 100 g of milk in the first group was higher than in the second by 0.97 kcal and by 0.46 kcal than in the third group. The results of the study suggest that the linear affiliation of animals to a certain extent affects the dairy productivity of cows.