Phytase is an enzyme that increases the digestibility of phytate phosphorus, which improves the overall availability of dietary phosphorus. The use of this enzyme as a feed additive in swine diets reduces the requirement for inorganic phosphorus supplementation.
As inorganic phosphorus is replaced by corn or other grains in the diet formulation, the diet’s overall energy content increases. Improved phosphorus utilization and reduced inorganic phosphorus in the diet result in less phosphorus excretion from pigs.
Phytase also can increase availability of other minerals such as calcium. As phytase is sensitive to high temperature and humidity, proper storage and handling procedures should be followed to maintain the efficacy of the product. Heat stability of the product must also be considered when diets are pelleted.