Effect of premix 'laura' feeding on the highly productive lactating cows during the initial milking period

Efficiency of premix 'Laura' and its influences on animal physiological state, productivity, milk quality was studied at feeding the resent calving lactating cows in the initial milking period. The volatile oils, vitamins and antioxidants there are in the composition of this premix. In the breeding farm "Poyma" (the branch of Federal Williams Research Center of Forage Production and Agroecology) the trial was carried out on Holstein cows with milk productivity of 10 000 kg during 305 days of lactation. These cows were blocked by pair-analog method in 4 groups, which were fed by balanced diet of bulking feeds by own production and purchased concentrated feeds (control group). The cows of experimental groups obtained additionally premix 'Laura' in the different doses: 2, 5 and 7 g/head per day. It has been found out positive effect of the feed additive for average milk yield per day, fat and protein content in milk, biochemical parameters of blood. The most appropriate variant of 'Laura' premix addition to diet has been determined as 5 g/head per day. Due increasing the average per day milk yield with basic fat content of 6.6% in comparison to animals that did not have a feed additive in the diet, an income of 10903.3 rubles per cow was obtained for 90 days of experience.