The effectiveness of the use of microalgae in the diets of lactating cows and their effect on milk production and blood biochemical parameters

The study of the effect of various feed additives in the diet of lactating cows is an urgent problem, since during this period of production use, animals experience increased loads - recovery after calving, negative energy balance of live weight, decreased appetite, high loads on milk synthesis. The aim of our research was to study the effect of a suspension of chlorella grown in an automatic mobile plant on the milk productivity of first-calf heifers and young cows at the beginning of lactation. We used zootechnical and biochemical studies. First-calf heifers and cows of the second lactation included 1 liter of liquid suspension of chlorella, grown according to the new, patented, technology of Amfor LLC. Monitoring of daily milk yield was carried out weekly during the first phase of lactation. The inclusion of chlorella suspension had a positive effect on milk synthesis. The addition of chlorella suspension effectively affected the daily milk yield of cows from the ninth to the twelfth week of lactation. Starting from the thirteenth week of lactation, the daily milk yield of cows in the experimental and control groups decreased, but remained at a high level. Biochemical studies of the blood of cows in the first phase of lactation did not reveal significant changes in metabolism. No metabolic diseases were detected by the veterinary service.