Superdosing phytase BENEFITS BEYOND SPARING NUTRIENTS

摘要

The vast majority of commercial phytase use today focuses on the reduction of feed costs through sparing of inorganic phosphorus (P) and to a lesser extent calcium (Ca) sources. With each 0.01% of available P (AvP) valued between ￡0.06 to ￡0.18, depending upon ingredient costs and requirements, the return on investment from a phytase can be as much as 10:1. As a result, it is not surprising that phytase use is almost universal in monogastric diets. Dose response curves have been derived for all products on the marketplace and shown to be log-linear (Fig 1), i.e. a log increase in dose is required to maintain a linear increase in performance.