MEASURES TO IMPROVE THE DAIRY HERD OF CATTLE PRODUCTIVITY

Feeding Holstein cows is most difficult in a certain phase of lactation, immediately after calving, when both the need for nutrients and milk production increase. To fully realize the genetic potential and main-tain productivity, a full-fledged, balanced feeding and its competent organization are required. Research was carried out on a dairy farm in the Krasnodar Region, which is intensively engaged in dairy cattle breeding. The average annual milk yield was 11,073 kg in kind. The purpose of research is to study the effect of the Pennsylvania sieve on the milk productivity of Holstein cows in the Krasnodar Region. With the help of the computer program DairyComp 305 the data on the milk productivity of the herd at the en-terprise were studied, the feeding ration, the compound feed formula were analyzed. The composition of the diet for dairy cows is mainly dominated by corn silage – 23.0 %; then compound feed № 1 – 15.96 %, alfalfa haylage amounted to 4.56 % and alfalfa hay – 0.6 %. In the composition of compound feed № 1, barley predominates in large quantities – 2865 g, then crushed corn and corn bard 900 g each, wheat bard 720, gluten feed – 610, soybean cake 480, rapeseed 430 and beet pulp dry 420 g. By optimizing the composition of the compound feed, depending on the physiological state of the cows, and to ensure the homogeneity of the feeding of animals on the farm, a Pennsylvania sieve was used. As a result, the aver-age milk yield per lactation was 11873 kg, the average mass fraction of fat was 3.65 %. After the use of the Pennsylvania sieve in feeding 921 cows from the second and older lactation, the largest number of animals (24 %) had milk yields ranging from 10,001 to 11,000 kg of milk. In second place are cows (22 %) with milk yields from 11,001 to 12,000 and in third place (15 %) with milk yields from 12,001 to 13,000 kg of milk.