The influence of the complex application of protein of microbiological synthesis, Spirulina platensis, and organic iodine to enzymatic and microbiological processes in the rumen and interstitial metabolism of sheep
The purpose of the research was to study enzymatic and microbial processes in the rumen of sheep, the state of interstitial metabolism in the body with the integrated use of Spirulina platensis, organic iodine, and protein of microbiological synthesis. The experiment was conducted by the groups-periods method (control and experimental, n = 6) in sheep with rumen fistulas. In the control period, the animals ate the main diet; in the experimental period, a biologically active mixture was added at the rate of 5 g/day. The mixture consists of organic iodine, dry biomass of Spirulina platensis microalgae, and dry sprouts as a filler in a proportion of 40%, 6%, and 54%, respectively. During the test period, the sheep were also fed by the protein of microbiological synthesis at the rate of 30 g/ day. Three hours after feeding, the pH of the chyme in the experimental period decreased to 6.62 units; in the control period, the value of this indicator, despite the decrease, remained higher (6.85 units). The ORP after feeding in the control period increased by -0.25 mV, and during the experimental period, it decreased by -72 mV and approached the neutral state. The use of microbial protein in the diet of sheep in combination with Spirulina platensis and organic iodine increased the total number of microorganisms in the rumen chyme by 65.3%, including the number of bacteria by 74.3% and the number of ciliates by 53.2%. However, significant differences with the control (p was less or equal to 0.05) were registered only in terms of ciliates population. When the studied biologically active and nutrients were included in the diet of sheep, we noted positive tendencies associated with an increase in the content of bilirubin in the blood serum, glucose, cholesterol, albumin, and urea, as well as negative tendencies due to a decrease in the concentration of triglycerides. The use of the specified complex of compounds had no significant effect on mineral metabolism and morpho-haematological parameters.