Biomarker and pathway analyses of urine metabolomics in dairy cows when corn stover replaces alfalfa hay

Table 1 Results from the urine metabolomic pathway analyses in cows fed CS and AH diets^a

Pathway	Hits^b	P value	Home P ^c	Impact value
Tyrosine metabolism	3	0.003	0.048	0.145
Starch and sucrose metabolism	1	0.030	0.416	0.150
Amino sugar and nucleotide sugar metabolism	1	0.030	0.416	0.086
Galactose metabolism	2	0.097	0.875	0.119
Phenylalanine, tyrosine and tryptophan biosynthesis	1	0.138	1.000	0.500
Purine metabolism	1	0.152	1.000	0.0002
Glycerolipid metabolism	1	0.967	1.000	0.105

^aCS = diet containing corn stover as the main forage; and AH = diet containing alfalfa hay as the main forage
^bHits represents the number of metabolites in one pathway
^cHome P indicates the statistical P values that were further adjusted using the Holm-Bonferroni method for multiple tests