The article presents the results of studies of the chemical composition and nutritional value of silage prepared from joint sowing of corn with various FAO and sorghum. On average, silage from green mass of corn and sorghum contained less than 1.03 % absolute protein, 0.31 % fat and more than 7.42 % fiber, calculated on the absolutely dry substance. Differences in chemical composition caused the nutritional value reduction of the silage from green mass of corn and sorghumjoint crops an average

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... f 12 variants from 10.38 to 9.23 MJ per 1 kg of dry matter. Corn hybrids with optimal FAO had been identified; its use in joint crops with sorghum will provide silage obtaining which quality is not inferior to corn crops, it will contribute to ensuring a stable forage base for highly productive animal husbandry. At the proper selection of corn hybrid, a reduction in the protein conten, compared to corn silage, almost does not occur. On the best options, the difference in the content of crude protein is only 0.1-0.2 % in terms of absolutely dry substance. Correct selection of corn hybrids allows to reduce the DOE content in experimental silage compared with corn silage from 1.1-1.6 to 0.5-0.7 MJ MJ kg of dry substance. As a result of the studies, on average, in 12 variants, a significant decrease in the digestibility of dry substance (p≤0.01), protein (p≤0.001) and BES (p≤0.05) was found in comparison with corn silage. The difference between the coefficients of digestibility of raw fat and crude fiber was not installed. Silage from corn hybrids with FAO 300 and above and sorghum did not have significant differences in digestibility of dry substance, fiber and BES, with a significant increase (p≤0.05) of fat digestibility compared to silage from analogous corn hybrids.