Fattening of Young Beef Cattle on Hay Diets
The article presents the results of studies on the use of hayfood rations from perennial legumes prepared in packaging film for feeding young cattle. The diets of feeding young cattle are balanced according to the main elements of nutrition, which made it possible to obtain average daily gains at the level of 10220–1244 grams. The nutritional value of the diets was almost the same in the groups and amounted to 9.33–9.39 energetic feed unit. It was found that animals treated with alfalfa and goat senator digested dry matter better by 7.83 and 3.4 %, crude protein by 5.41 and 1.87 %; crude fat by 19.89 and 4.67 %, crude fiber by 16.46 and 14.10 % compared with calves receiving clover hay, respectively. Using silage diets from these crops improves energy metabolism. The coefficient of productive use of metabolic energy by animals of the 3rd experimental group was 43.91 %, which is 5.15 % more than in the 1st experimental group, by 8.60 % from the 2nd experimental group. Animals of the 3 experimental groups were characterized by a higher slaughter yield, in comparison with other groups. The cost of feed per unit of increase in live weight of animals in group 2 was 9.19 energetic feed unit, which is 0.9 energetic feed unit and 1.73 energetic feed unit less than in 1 and 3 groups.
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