STUDIES INTO THE EFFECTS OF FEEDING INTEN SITY ON GROWTH, NUTRIENT GAIN AND THE NUTRITIONAL-VALUE OF EDIBLE TISSUES IN BLACK-PIED DAIRY BULLS

Title of the paper: Studies into the effects of feeding intensity on g rowth, nutrient gain and the nutritional value of edible tissues in Bl ack-Pied-Dairy bulls. The effects of feeding intensity on growth, nutr ient intake and the nutritional value of edible tissues were studied i n an experiment involving 321 Black-Pied-Dairy bulls. The three feed g roups (I, II and III) had a daily metabolizable intake of 40.6, 59.0 a nd 73.0 MJ respectively. The metabolizable energy intakes required for a gain of 1 kg live weight and edible protein up to a final fattened weight of 550 kg were 88.0, 70.0 and 67.2 MJ, and 839.0, 796.9 and 753 .4 MJ respectively. Feeding intensity affects the daily growth of edib le tissues and the gain in edible protein and fat. To combine economic nutrient input with high nutritional value of the edible tissues, int ensive barn fattening of Black-Pied-Dairy bulls only should continue u p to a live weight of 500 kg.