Age dynamics of the ATPase activity of milk cows of black-and-white and Simmental

Found that higher levels of the ATPase activity of membrane components of milk cows of black-and-White and Simmental breeds characteristic age of 48 months., Low - to 24 mo. The results of analysis of variance showed that the activity of common and Na +, K +-ATPase activity of milk was significantly determined by age, more so in the group of black-and-white cows.