The influence of Holstein bulls of the Danish and Canadian breeding on productivity of cows of Yenisey type of red-spotted breed

The objective of this study was a comparative study of the influence of Holstein bulls of different lines of the Danish and Canadian breeding productivity on daughters red-spotted breed of Yenisey type. Material and methods of research. Scientific and economic experience was held at JSC «Tubinsk» Krasnoturansky district of Krasnoyarsk region. In the farm four groups of cows for 20 goals each have been identified basing on the principle of analogues. In the first and second group animals of the line Reflection Sovering 198998 Danish and Canadian breeding, in the third and fourth line animal Vis Backing Ideal 1013415 the Danish and Canadian breeding were included. An average yield of milk given by experimental cows for 305 days of lactation was 7438 kg. The highest dairy productivity had descendants of the ox Double 7892 kg. The highest fat content in milk was in bull Duet’s daughter, it was equal to 4,16 %. As a result, the output of milk fat maximum was also in this group and it was equal to 324.7 kg. The highest productivity and qualities of udder had been observed in the first and third groups (8005 cm 3 and 8336 cm 3 respectively). All groups of animals have a high milk productivity (7892-7804) intensity of the lactation (1383-1404). The bulls used on the farm had positive impact on dairy efficiency and functional properties of an udder of the cows of red and spotted breed of the Yenisei type held at JSC «Tubinsk».