Milk productivity of cows in leukosis development stages

The article considers the impact of stages of leukemia development on the milk productivity of cows. For this purpose, the stages of leukemia development are studied and the data of the milk productivity of the research groups of large slingshot are analyzed. The subject of research was a healthy, seropositive (RID +) and hematologic ally sick leukemia cow of one of the owners of the Chuvash Republic. For the purpose of research, they used statistical, serological, hematological methods of research. The research animals were subdivided into 4 groups. Midwife milk from cows of all groups identified in the milk transfer 1% fat content. In this host every year for the past ten years serological and hematological methods diagnosed leukemia large horned scrap, and antileukemia events were not carried out in full volume. Retrospectively, the genetic potential of cow productivity based on the results of control doses in the whole herd was at the same level. Confirmed the fact of increased development of leukemia among infected VLCRS animals with high milk productivity. And the pathogenic effect of VLCRS on the animal body is determined to reduce the milk productivity of cows regardless of their genetic potential.