Role somatotropic hormone and IGF-1 in the body's protein metabolism calves of Holsteininned black-variety breed

The conjugation of the somatotropin level and the insulin-like growth factor type I with the protein metabolism state in the body of calves has been studied. The subject of the study were calves of Black-and-White holstein during the dairy period of postnatal ontogenesis. It has been found that the live animals weight increases in 3.14 times during the study period. Animal body growth is associated with a concentration decrease of chondrotropic hormone in blood in 1.80 against an IGF-1 increase in 23.36. Total protein level (9.53 %, p