EVALUATION OF ASPERGILLUS-NIGER PHYTASE A ND PHOSPHATE WITH WEANED PIGLETS .2. CONTENT AND GAIN OF PROTEIN, FAT, ENERGY, ASH, CA AND P IN THE ANIMAL BODY

A high phytic acid diet (barley, wheat, soya bean meal, 4g P/kg diet, of that 2/3 phytate P) without added phytase, with phytase supplement (1000 U/kg diet) or with supplementary phosphate (2.2g P/kg diet) was examined with 3 X 12 weaned piglets. The three diets contained 8g Ca/k g. At the end of experiment 6 pigs/group were slaughtered. In animal b ody (as empty body) the content and gain of ash, P, Ca, protein and fa t were detected. P supplementation and supplementary phytase had no ef fect on dry matter, protein and fat content of animal body. The enzyme but more the supplementary phosphate increased mineralization of skel eton and made the animal body higher in ash, P and Ca content. Piglets without supplementary phytase and P gained 1.1g P daily. Phytase incr eased daily P gain by 0.5g(P < 0.05), the phosphate by 1.4g (P < 0.001 ). The daily Ca gain was 1.7; 2.8 and 5.1g in the different groups. A piglet (body weight 20kg) with sufficient P and Ca in the diet gains 5 g P and 10g Ca per kg body weight gain (empty body).