The Bottom Line

The addition of 250 U/kg of phytase to diets fed to growing pigs maintained performance compared to a positive control supplemented with inorganic P (DiCal). Phytase decreased the amount of P excreted into the feces (increased P digestibility) even at the highest increment of phytase used in our study (2000 U/kg). The phytase enzyme is a tool that allows producers to formulate diets with less total P. Phosphorus output in the manure can be minimized without sacrificing performance. New technologies for the production of phytase are being developed, providing the producer with increased flexibility and selection.