Studies have shown the effect of synbiotics on the dairy productivity of cows, the biochemical composition of blood and reproduction indicators. The aim of our research is to determine the effect of a complex feed additive on milk productivity and health indicators of lactating cows during the milking period. Two groups of animals were formed, which received the same balanced diet for all nutrients. The diet of the experimental group included a complex feed additive, which was fed to animals in a mixture with concentrated feeds in the amount of 40 g / head / day. The inclusion of the supplement was started 14 days before the expected calving and during the subsequent period of separation. In the first three months of lactation, the daily milk yield of cows in the experimental group exceeded the control indicators by 1.9; 5.7; 5.7%, respectively. During the entire period of research, the daily milk yield of cows in the experimental group was 36.5 kg, in the experimental group – 38.2 kg, which is higher than the control by 1.67 kg of milk per day. Gross milk production for the entire study period exceeded the indicators of the control group by 147.55 kg (or 4.5%). The milk protein yield in the experimental animals was 3.85 kg higher than in the control group. The animals of the experimental group had a higher level of carotene in the blood – 0.7 mg% versus 0.41 mg% in the control group. An increased glucose content in the blood of experimental animals was found in the amount of 3.45 mmol/l versus 2.97 mmol/l in the control group. The inclusion of a feed additive in the diet contributed to the productive insemination of 75% of cows, in contrast to the control group, in which only 33% of animals were inseminated productively
Keywords
milk productivity, russian black pied cows, feed additive, Russian Black Pied cows, biochemical composition of blood, reproduction indicators