high-NFC diets compared with those fed the CON diet.
In addition, cows fed high-NFC diets had lower rumen
NH3-N concentration (P < 0.01) and ratio of acetate
to propionate (P = 0.02) than those fed the CON diet.
Cows fed high-disaccharide diets had lower molar proportion
of acetate (P = 0.03) but higher molar proportion
of butyrate (P < 0.01) compared with those fed
the STA diet. The molar proportion of butyrate was
higher for cows fed the LAC diet than for those fed the
SUC diet (P = 0.01). Total VFA concentration, the
molar proportion of propionate, and total VFA absorption
rate were not different among all treatments.