ADG	Average daily gain
ADMI	Average daily dry matter intake
F/G	Feed-to-gain ratio
DM	Dry matter
CP	Crude protein
NDF	Neutral detergent fiber
ADF	Acid detergent fiber
EE	Ether extract
AIA	Acid-insoluble ash
VFAs	Volatile fatty acids
NH3-N	Ammonia nitrogen
MCP	Microbial crude protein
A/P	Acetate-to-propionate ratio
BUN	Blood urea nitrogen
TP	Total protein
ALB	Albumin
GLU	Glucose
CAT	Catalase
SOD	Superoxide dismutase
GSH-Px	Glutathione peroxidase
MDA	Malondialdehyde
TMR	Total mixed ration
PCoA	Principal coordinate analysis
LEfSe	Linear discriminant analysis effect size
KEGG	Kyoto Encyclopedia of Genes and Genomes
SEM	Standard error of the mean
SD	Standard deviation
NEmf	Net energy for maintenance and growth
ANCOVA	Analysis of covariance
BW	Body weight
ANOVA	Analysis of variance
OTUs	Operational taxonomic units
LDA	Linear discriminant analysis