This study was conducted to evaluate the effects of Bacillus subtilis (BS),montmorillonite (MMT) and their interaction on performance,the apparent utilization of nutrients,and the gene expression of nutrient transporters in intestinal mucosa of laying hens. The trial used a 2×2 factorial random design,the main effects were BS (0 and 0.5 g /kg),MMT (0 and 0.5 g /kg),and the interaction between them,respectively. A total of 360 healthy 29-week-old Lohmann pink hens were randomly arranged into 4 groups with 6 replicates per group and 15 hens in e...