Features of rumen digestion in young cattle of meat breeds with differences in feeding

Each type of feeding has its own characteristics due to the specific effect of feed on metabolism, physiological condition and animal productivity. So, the aim of the study was to study carbohydrate and nitrogen metabolism at various ratios of rough, concentrated and succulent feeds in the diet of young cattle during fattening. The intake of a large amount of easily digestible carbohydrates when the energy saturation of the diet is increased at the same time, increases the concentration of LFA in the rumen fluid, which points to an increase in the rate of fermentation of fiber fractions. Feeding a silage diet with an increased level of metabolic energy contributed to an increase in the total amount of VFA by 14.5% compared with the control group. The introduction of corn silage and concentrates in the diet in the experimental group contributed to a significant 12.9 mg% decrease in protein breakdown. The highest concentration of total amino acids in the rumen fluid was observed with a silage diet with a high level of concentrated feed, 514 mg%, which is 139 mg% higher than when feeding diets with low energy saturation. With this diet, the highest average daily gain in live weight (834-1042 g) was also observed. In hay rations, the concentration of total amino acids in the sample of rumen fluid was 408-505 mg% in both groups of animals. The average daily gains in these groups were 730-897 g.

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