Impact of phytase supplementation on nutrient variability, growth, and digestibility in weaned pigs fed a corn‐SBM complex diet

This study evaluated the effects of different nutrient matrices, with or without phytase supplementation, on growth performance, nutrient digestibility, ileal amino acid (AA) digestibility, and blood inositol in pigs fed a complex diet based on corn‐soybean meal. Four hundred newly weaned cross‐bred (Landrace × Yorkshire × Duroc) 21‐day‐old piglets of initial body weight 6.35 ± 1.91 kg were allotted to one of the five dietary treatments: Control (CNT), a corn‐soybean‐based standard diet; negative control 1 (NC1), a standard diet with reduced available phosphorus (Av.P) (−0.125%), metabolizable energy (ME) (−40 kcal), and crude protein (CP) (−0.3%); NC1 with 500 phytase units per kilogramme (FTU/kg) (N1P5); negative control 2 (NC2), a standard diet with greater reduction of Av.P (−0.150%), ME (−55 kcal), and CP (−0.45%,); and NC2 with 1000 FTU/kg (N2P10). Piglets were housed in a random arrangement based on sex and body weight and data were analyzed as a randomized complete block design using analysis of variance. Results showed that the body weight and average daily gain of the NC2 treatment were lower (p