USE OF SOY PROTEIN-CONCENTRATE IN COMBINATION WITH POTATO PROTEIN IN MILK REPLACERS FOR VEAL CALVES

An experiment was conducted to evaluate the performance of soy protein concentrate in combination with potato protein concentrate as alterna tive protein sources in milk replacers for veal calves. In the feeding trial there were two groups with 24 calves in each group. For the fir st fattening period the milk replacer for Group 1 (control) contained 60% skim milk powder and 21.8% whey powder. For the second fattening p eriod 56% skim milk powder and 21.2% whey powder were used. The milk r eplacer for Group 2 (experimental) for the first fattening period cont ained 30% skim milk powder, 47.3% whey powder and 3% potato protein co ncentrate. For the second fattening period 59.3% whey powder, 4.5% pot ato protein concentrate and 11.5% soy protein concentrate were used. D aily weight gain and feed efficiency of Group 1 were 1057 g and 1.60 k g, respectively. For Group 2 they were 1043 g and 1.64 kg, respectivel y. The digestion results for the milk replacer used for Group 2 in the second fattening period were significantly better concerning nitrogen -free extracts.