Аннотация
The paper analyzes the milk production of Holstein breed of cattle imported from Canada to Kazakhstan.It is found that milk production of Holstein heifers in Northern Kazakhstan conditions is in high enough amounts: milk yield for 305 days of lactation of Canadian heifers is 6,627 kg and for the animals of own reproduction is 6,488 kg.However, the acclimatization of Holstein cows is satisfactory, and they concede to the local animals of black-motley breed on reproductive qualities, especially on the duration of the service period.This is also evidenced by the birth of calves per 100 cows, which was 96.5% for black-and-white cattle, whereas this figure was 76.5% for imported Holstein cows, and it's increased to 78.8% for Holstein cows bred in the conditions of Northern Kazakhstan.