Optimization of protein nutrition while increasing the milking capacity of cows

Abstract

The task of feeding ruminants is to create optimal conditions for the work of rumen microflora, a reserve for increasing productive qualities is the use of protected (transit) protein, which minimizes the load on the liver. In order to optimize protein nutrition of dairy cows, an experiment was organized on the use of protein feed additives. During the period of increasing the milking capacity of cows, three groups (control and two experimental) of 50 heads each were formed from the cows of the Red Steppe breed. Against the background of the farm diet (control), in the 1st experimental group, feed yeast was additionally used in the amount of 1 kg/head/day, and in the 2nd experimental group, high-protein concentrate Kaufit 60 was used in the amount of 850 g/head/day. The supplement Kaufit 60 is a mixture of plant, animal and synthetic components with a crude protein content of 60%. The studies showed that additional use of yeast contributed to an increase in crude protein in the diet by 7%, digestible protein by 5%, and the ratio of rumen and intestinal fractions was 65/35. The use of the protein supplement Kaufit 60 contributed to an increase in crude protein by 13%, digestible protein by 15%, the increase in the amount of transit protein in the diet was 40%, the SP/NSP ratio was 60/40. An increase in gross milk yield in experimental groups from 6 to 13% was noted. The balance of energy and protein in the feed in the group using Kaufit 60 contributed to a reliable increase in fat content and protein levels by 0.1 and 0.2%, respectively, the level of urea in milk was within the physiological norm. The use of protein feed additives in experimental groups led to an increase in feed costs, while the increase in revenue from milk sales amounted to 6 to 13%, and profit from 2 to 8%.