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Table 4 Effects of dietary Fps:Cps and FA supplementation (0 or 24 g/d) on CH4 emissions and ruminal fermentation parameters

From: Effects of fumaric acid supplementation on methane production and rumen fermentation in goats fed diets varying in forage and concentrate particle size

Items Low-Fps:Cps High-Fps:Cps   P-value
FA, g/d 0 24 0 24 SEM Fps:Cps FA (Fps:Cps) × FA
CH4, L/d 23.14 15.80 22.84 18.75 1.245 0.552 0.021 0.466
CH4/DMI, L/kg 21.03 14.54 20.94 17.95 1.044 0.365 0.020 0.341
pH 6.38 6.52 6.40 6.51 0.027 0.887 0.020 0.817
Total VFA, mmol/L 89.19 85.89 87.01 80.53 1.326 0.633 < 0.001 0.187
Individual VFA molar proportion, %
 Acetate 70.24 65.50 66.93 63.50 0.526 0.009 < 0.001 0.518
 Propionate 14.80 20.58 19.07 21.98 0.437 0.001 < 0.001 0.074
 Butyrate 11.93a 10.79b 10.82b 11.20ab 0.170 0.303 0.259 0.026
 A:P 4.89a 3.62b 3.74b 3.15c 0.095 < 0.001 < 0.001 0.048
  1. FA fumaric acid, Fps:Cps ratio of forage particle size: concentrate particle size, A: P Acetate: propionate, SEM pooled standard error of the means
  2. a,bDifferent letters in the same row means significant differences (P < 0.05)