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Principal coordinate analysis (PCoA) of the rumen bacterial community. The principal coordinate analysis is based on the weighted UniFrac distances between the microbiome profiles. U0_A0, basic diet only; U0_A0.45, basic diet plus AHA of 0.45 g/kg DM; U5_A0, basic diet plus urea of 5 g/kg DM; U5_A0.45, basic diet plus urea of 5 g/kg DM and AHA of 0.45 g/kg DM.
