Effects of Dietary Crude Protein Levels on Fecal Crude Protein, Amino Acids Flow Amount, Fecal and Ileal Microbial Amino Acids Composition and Amino Acid Digestibility in Growing Pigs.

Fecal PN flow amounts was a highly significant difference among the three experimental groups ( p < 0.01), i.e., lower in the 12% CP group than in the 15% and18% CP group ( p < 0.05), but there were no significant differences in feces PN flow amount between the 15% CP group and the 18% CP group ( p > 0.05).

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