The effect of fulvic acid on the biochemical status of mature dry cows

Summary An integral part of the effective production of agricultural products is the full-fledged feeding of animals, for which various feed additives are used. Biologically active substances of natural origin, which are more suitable for the animal body, are non-toxic and have no side effects, in particular fulvic acid, have an undoubted priority among them. The article examines the effect of the use of fulvic acid in the diets of pregnant cows on the biochemical parameters of blood serum. The experimental part of the work was carried out in the farm Ermolinskoye in the Novgorod region on the stock of old-age dry-resistant Holstein cows. Three groups of animals were selected (n=10), the control group consumed a basic nutritionally balanced diet (RR) for this category, the first experimental group consumed RR + fulvic acid (20 ml/head/day), the second experimental group consumed RR + fulvic acid (25 ml/head/day). The research results showed that the concentration of the studied metabolic products in the blood of animals was mostly in the range of normal values, but there were intergroup differences. Thus, an analysis of the parameters of the protein index showed that the use of fulvic acid in a dosage of 25 ml in the diet led to a decrease in its value below the recommended values, and amounted to 0.84 versus 0.9 in the control and first experimental groups. An increase in the mass dose of the supplement to 25 ml also led to a decrease in the urea content in the blood serum compared with these groups. The decrease in the ratio of AST to ALT in the experimental groups, especially in the first one, can be regarded as a reduction in pathological changes in the liver and a manifestation of the hepatoprotective therapeutic effect of fulvic acid. The study of experimental data allows us to conclude that the use of fulvic acid in the diets of deeply pregnant cows did not have a critical effect on the composition of blood serum. The results obtained allow us to recommend fulvic acid for use in the diets of deeply pregnant cows on farms in the North-Western region in the amount of 20 ml per head per day.