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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 (InsP3–6) and myo-inositol (MYO) concentration. Throughout this28 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 + 2,000FTU/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 InsP6and InsP5(P<0.001) at the terminal ileum but had no effect on InsP4or InsP3concentrations. The InsPxdegradation 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 InsP3–6concentration, or MYO generation.