Fig. 1. Effects of dietary coated CuSO₄ and ZnO on alpha diversity of fecal microbiota of weaned pigs (n = 3).

Alpha diversity indices were (A) observed OTUs, (B) Chao1, (C) Shannon, and (D) Simpson. Statistical difference was performed using the analysis of ANOVA. CON, a basal weaner diet based on corn and soybean meal; T1, CON + 2,500 ppm standard ZnO; T2, CON + 100 mg/kg dietary coated CuSO₄ and 100 mg/kg dietary coated ZnO; T3, CON + 200 mg/kg dietary coated CuSO₄ and 200 mg/kg dietary coated ZnO.