Effects of zinc oxide supported on zeolite on growth performance, intestinal barrier function and digestive enzyme activities of Nile tilapia

A total of 720 Nile tilapia fingerlings were allocated to four treatments and used to investigate the effects of zinc oxide supported on zeolite (Z‐ZnO) on growth performance and intestinal function. The basal diet (control) was not supplemented with zinc and contained 60 mg Zn kg−1. The other three groups were added 30 mg Zn kg−1 to the basal diet, in which zinc was supplemented as Z‐ZnO, Z + ZnO (mixture of zeolite and ZnO) or ZnSO4, respectively. As compared to the control, supplemental Z‐ZnO improved (P