The aim of the experiments was the evaluation of the physiological and productive effects of the application of full diet silages in the nutrition of heifers, bulls, milk cows and sheep. These silages contained sugar beet or half-sugar beet (50% d.m.) urea (20 - 60% N in total N ) , fiber foods, mineral additions and conservants. The average content of d.m. in silages was 21 - 26%, crude protein and crude fiber was 13 - 16% and 12 - 16% respectively and the concentration of the metabolic energy (ME) was 9.4 - 10.6 MDME per kilogram d.m.. The application of these silages alloued to eliminate the concentrates from the diet for heifers, bulls and sheep. Feeding ad libitum gave the body gain 0.8 - 1.0 kg per day in the case of the bulls. In the case of heifers good health and fertility uas obtained. Cous fed with these silages gave about 12 l of milk per day. These effects were due to good mutual cooperation of the energetic and nitrogen metabolism in the rumen of the animals fed with the diet containing beet and urea.