Digestibility of dry matter and bioavailability of starch of various types of grain in the rumen

The constant introduction of a huge amount of concentrates at the stage of growing and fattening animals can lead to diseases associated with non-compliance with the feeding technique (acidosis). In this regard, the study of metabolism, destruction of dry matter, as well as starch in various feeds of grain origin, including those growing in the Orenburg region and contributing to the acidification of the rumen, is essential and necessary to increase feed efficiency. The highest rate of starch digestion six hours after incubation was in rye, exceeding the similar values of other crops by 0.4-1.3%. Further, two groups of crops should be distinguished with almost the same rate of starch digestion: these are wheat, imported barley, oats and chickpeas, domestic barley. It should be noted that the lowest rate of starch digestion was characteristic of the latter group (6.0%). The need to study the decay of the components of cereals with their active feeding to cattle is important. Including it is necessary to consider regional peculiarities of cultivation of these crops, since the content of substances in the grain, and for the same species, varies greatly, which ultimately affects the feed efficiency.