Physiological state and digestibility of nutrients when feeding steers with feeds with different protein cleavage

The article presents the results of studies on the effect of feeding bulls diets with different protein cleavage on the indicators of cicatricial digestion and digestibility of nutrients.

Studies have found that a decrease in protein cleavability due to a change in the percentage of cleavable protein to non–cleavable from 70 to 67 and 61% was accompanied by an increase in the concentration of LVF in the scar content by 18.8 (P<0.05), 16.8 (P<0.01)%, infusoria – by 16.0 and 12.1% (P<0.05), respectively. The content of ammonia in the rumen of animals consuming a diet with 61% of the cleavable protein decreased by 11.5%, from 67% – by 15.3% (P<0.05). This fact indicates that there is a fairly high activity of fermentation processes in the rumen of these animal groups.

Animals with a protein cleavage level of 61% in their feed. dry matter was digested better by 2.3(P<0.05)%, organic matter – by 3.4 (P<0.05), crude protein – by 12.3% compared to the control group bulls, whose diet contained 70% of the cleavable protein.

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