The reasons for withdrawal and term use of new types of cows of brown Schwyz and Sychevskaya breeds

The performance of dairy cows productivity of the type "Vazuzsky" in the Sychevskaya breed and the type "Smolensky" in the Brown Schwyz breed depending on the cause and age of retirement for a number of years were studied. 203 cows of the type "Vazuzsky" with a total of 898 lactations and lifetime milk yield of 22507 kg per cow, with an average age of productive use of 4,9 lactations were examined. At 423 cows of the type "Smolensky" these figures were: 2196 lactations, 26818 kg and 5,4 lactations. The analysis has shown that the major causes of the cows withdrawal in a new type of the Sychevskaya breed are the following: reproductive disease (22%), diseases of the legs (17%) and diseases of the udder (15%), as in a new type of Schwyz breed - reproductive disease (23%), metabolic diseases (19%) and low efficiency (14%). The animals of the type "Smolensky" of Brown Schwyz breed were notable for the greatest productive use of the term, the higher milk yield in the first lactation for a whole lifetime.