Reproduction and quality of milk of Simmental and Black-and-White cows
The article deals with the problem of obstetric and gynecological diseases among high producing dairy cow at farms of different ownership forms in the Saratov region. Correlation analysis revealed result of involution in the postpartum period depending on the condition of animals during pregnancy and childbirth (40,39± 5,35 and 51,43± ±3,44 % respectively). It has been revealed that the milk of Simmental cows compared to Black-and-White ones contains more essential amino acids, which gives it a high biological value. In the milk of cows from the work-study unit «Mummovskoe» contains 2,3 times more fat-soluble vitamins than in the milk of cows from Agricultural Production Cooperative «Collective farm Krasavskiy»; in the milk of cows from the CJSC Stud Farm «Trud» contains 1,7 times more fat-soluble vitamins than in the milk of cows from JSC Farm Firm «Volga». Simmental cows' milk is better for cheese making. It was established that the milk quality is dependent on the animal management and their breed.