Fig. 5. STAMP analysis identifying the significant different fecal taxa at the genus level in weaned pigs among dietary treatments.

Statistical difference was measured using a two-sided Welch’s t-test (p < 0.05). 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.