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Table 3 Rumen fermentation characteristics in dairy cows fed with three experimental forage-based diets (n = 6)

From: Effects of dietary physical or nutritional factors on morphology of rumen papillae and transcriptome changes in lactating dairy cows based on three different forage-based diets

  Dietary treatmentsa P-value
Item AH CS RS SEM AH vs. CS AH vs. RS CS vs. RS
pH 6.39 6.41 6.39 0.050 0.89 0.98 0.85
Ammonia-N, mg/dL 14.5 15.8 20.3 1.07 0.37 0.01 0.04
Total VFA, mM 93.5 81.0 83.1 2.83 0.04 0.02 0.63
Acetate, mM 66.2 57.1 59.8 1.99 0.03 0.02 0.20
Propionate, mM 19.4 17.2 17.1 0.75 0.14 0.07 0.95
Butyrate, mM 7.90 8.64 6.18 0.483 0.13 0.09 0.02
Molar proportion, %
 Acetate 71.1 70.3 72.2 0.89 0.03 0.40 0.02
 Propionate 20.7 21.4 20.5 0.55 0.51 0.80 0.36
 Butyrate 8.29 10.9 7.34 0.556 <0.01 0.27 0.02
Acetate: Propionate 3.47 3.24 3.60 0.108 0.23 0.45 0.07
  1. aAH = Total mixed ration (TMR) containing alfalfa hay as the main forage; CS = TMR containing corn stover as the main forage; RS = TMR containing rice straw as the main forage