Introduction

Pigs have a poor utilization of phytate-bound P derived from plant feed ingredients and supplemental phytase is, therefore, often used in pig diets (Selle and Ravindran, 2008), which is a very effective way to increase P digestibility. However, digestibility of Ca is also increased by phytase (Lee et al., 2023).

Bestzyme has recently been developed as a novel phytase, but there is limited information on how this phytase works on P and Ca digestibility. Therefore, the objective of this experiment was to test the hypothesis that a novel microbial phytase can replace some of the dietary P and Ca in diets for growing pigs without negatively impacting the standardized total tract digestibility (STTD) of P and Ca.