Metabolic processes in the body of cows when using organic iodine, microbial synthesis protein and Spirulina platensis in nutrition

Relevance. Of scientific interest are studies of the integrated use of feed factors aimed at enriching and increasing the biological potential of animal diets.Methods. The scientific and economic experiment was carried out on dairy cows of the Holstein breed at the "Mavrino" farm of the FSUE experimental farm "Klenovo-Chegodaevo" in two groups of 10 animals each. One group was the control group, the other was the experimental group. Cows of the experimental group two weeks before calving and within 100 days after calving received 150 and 300 g of microbial synthesized protein for the main diet, 25 and 50 g of biologically active mixture before and after calving, respectively. The mixture consisted of a granular mass of organic iodine containing 0.5 mg of iodine per 1 g, dry biomass of microalgae Spirulina platensis, dry beer sprouts as a filler in a proportion of 40, 6 and 54%. During the experiment, at the end of the first and third months of lactation following indicators were studied: biochemical indicators; hematological parameters; milk productivity and milk quality, reproduction indicators.Results. The inclusion of microbial synthesizet protein, microalgae Spirulina platensis and organic iodine in the diet of cows during the periparturient period had a positive effect on the interstitial metabolism of proteins, carbohydrates, lipids and minerals, optimized the activity of enzymes and hormones, resulting in the average daily milk yield in cows of the experimental group for three months after calving being 30.6, 33.3 and 27.8 kg, which was higher than that of the controls by 7.7, 7.1 and 14.1%. The cows of the experimental group also improved reproduction rates. 