Preparation of lake sapropel in cow diets in Novgorod region

Abstract

A positive effect of fulvic acid on digestion processes was established, especially in the second group. The digestibility of dry matter, crude protein, and crude fat was higher than the control values. The use of the feed additive in the diet reduced the number of pathologies in the post-calving period, shortened the restoration of reproductive functions by 24 days, and reduced the number of diarrhea cases in newborn calves by 40% relative to the control values. The results of the studies showed that the concentration of the studied metabolic products in the blood of animals was generally within normal values, but there were intergroup differences. Thus, the analysis of the protein index parameters showed that the use of fulvic acid in the diet at a dosage of 25 ml led to a decrease in its indicator below the recommended values, and amounted to 0.84 versus 0.9 in the control and first experimental groups.. A decrease in the AST to ALT ratio in the experimental groups, especially in the first one, can be regarded as a reduction in pathological changes in the liver and the manifestation of the hepatoprotective therapeutic effect of fulvic acid. A study of the 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 the 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-West region in the amount of 20 ml per head per day. Key words: fulvic acid, pregnant dry cows, diet, post-calving period, blood biochemistry; reproductive functions.