SEASONAL CHANGES IN MILK CHEMICAL COMPOSITION OF COWS WITH DIFFERENT LINEAR BELONGING AS DEPENDENT ON THE SYSTEM OF THEIR MANAGEMENT
The article is concerned with the studies devoted to changes of chemical composition of milk, produced by Holstein cows-first calf heifers of different linear affinity as depended on the system of their management. It was found that the cows kept under the loose housing system surpassed their analogues by the content of fat, protein, lactose, glucose in milk irrespective of the year season. The cows kept under the free-stabling system turned to be less sensitive to seasonal changes.