Keywords: silage, corn, sorghum, joint crops, nutrients, chemical composition
The article highlights the investigation 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 of 12 variants from 10.38 to 9.23 MJ per 1 kg of dry matter.
The content and ratio of acids in silos, specifically, the predominance of lactic acid and the absence of butyric acid, were determined. A higher content of acetic acid was established in silos from the green mass of landed crops, but this difference was not significant.
Using the content of butyric and acetic acids, as well as the pH, they the coefficient of fermentation was calculated and the absence of a reliable difference by this indicator between corn and corn-sorghum silage was established.
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 kg of dry substance.
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