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The effect of Echinacea purpurea polysaccharides (EP) supplementation on alpha diversity in the cecum of broilers. Alpha diversity analysis at 21 (A) and 42 d (B). CON21, EPL21, EPM21, and EPH21 represent EP addition levels of 0.0, 0.3%, 0.6%, and 0.9% in the diet at 21 d, respectively; CON42, EPL42, EPM42, and EPH42 represent EP addition levels of 0.0, 0.3%, 0.6%, and 0.9% in the diet at 42 d, respectively; n = 6. CON = control.
