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Laird S, Kühn I, Wilcock P, Miller HM The effects of phytase on grower pig growth performance and ileal inositol phosphate degradation Journal of Animal Science 94 142-145, 2016DOI:10.2527/jas2015-9762View abstract
© 2016 American Society of Animal Science. All rights reserved. This experiment was conducted to assess the effects of a standard and a high dose of phytase (Quantum Blue) on grower pig growth performance and ileal inositol phosphate (InsP 3–6 ) and myo-inositol (MYO) concentration. Throughout this 28 d study, 576 pigs (initial BW 17.3 kg) were fed 1 of 4 wheat–bar-ley–soybean meal–based diets. Experimental diets comprised a high-P positive control (PC; 4.1 g digestible P [dig-P]/kg), a low-P negative control (NC; 2.8 g dig-P/kg), the NC + 500 phytase units (FTU)/kg, and the NC + 2,000 FTU/kg. Each diet was offered ad libitum to 16 pens of 9 mixed sex pigs. Pigs fed both phytase treatments had increased ADG (P<0.01) and ADFI (P<0.05) compared to pigs fed the NC and were similar to those fed the PC. Furthermore, phytase reduced the concentration of InsP 6 and InsP 5 (P<0.001) at the terminal ileum but had no effect on InsP 4 or InsP 3 concentrations. The InsP x degradation patterns did not differ between the standard and high phytase treatments. In conclusion, phytase improved the growth performance of grower pigs fed a low-P diet; however, there were no differences between the 500 and 2,000 FTU/kg treatments in terms of growth performance, ileal InsP 3–6 concentration, or MYO generation.