Effects Of Phytase In Diets On Growth Performance, Serum Parameters And Dietary Nutrient Utlization Of Growing Pigs And Broilers

This study was concentrated to investigate the effects of phytase replaced different contents of DCP on the performance, nutrient utilization in corn-soybean meal diets for growing pigs and broilers.Experiment 1. 96 crossbred DurocxLandrace×Yorkshire (DLY) growing pigs about 30kg in body weight (BW) were randomly divided into 4 groups and fed corn-soybean diets. Each group with 6 repeats and each repeat had four pigs. Group A is control, group B, C or D are the test groups. The control diet was supplemented with 1.4% dicalcium phosphate. The test diets were the control diets in which dicalcium phosphate 40%, 60% or 80% was replaced with 250,500 or 700 phytase units per kilogram respectively. The results of 42-day feedy trial showed that comparing with group A , the average daily gain of group B, C or D increased by 1.05% (P>0.05), 4.09 % (P<0.05) or 2.64%(P>0.05) respectively; feed conversion ratio (F:G) decreased by 2.18% (P>0.05), 2.62% (P>0.05) or 1.75% (P>0.05)respectively. Feed Costs for body weight gain in group B, C or D were 97.31%, 96.98% or 97.81% of that for group A respectively; Calcium in serum increased by 4.22%(P>0.05), 4.22%(P>0.05), 8.12%(P<0.05); and...