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Table 2 Enteric methane (CH4) emissions of lactating cows fed high-starch or high-fiber diets (CTL) supplemented with bacterial direct-fed microbials (DFM) Propionibacterium freudenreichii 53 W (PF), Lactobacillus pentosus D31 (LP), and Lactobacillus bulgaricus D1 (LB)

From: Bacterial direct-fed microbials fail to reduce methane emissions in primiparous lactating dairy cows

CH4 emissions Treatment SEMa P-value
CTL PF LP LB Treatment CTL vs DFMb
CH4, g/d
 High-starch diet 286.4 327.8 303.9 271.4 21.12 0.33 0.56
 High-fiber diet 290.8 310.0 301.4 292.3 9.79 0.51 0.38
CH4, g/kg DMI
 High-starch diet 20.0 22.8 21.3 18.7 2.19 0.62 0.72
 High-fiber diet 23.9 24.8 24.0 24.0 1.16 0.93 0.81
CH4, g/kg milk
 High-starch diet 13.1 16.7* 14.6 12.6 0.78 0.02 0.12
 High-fiber diet 18.9 18.7 18.2 19.0 1.53 0.98 0.87
CH4, g/kg ECMc
 High-starch diet 12.6 15.6 14.4 12.5 1.02 0.15 0.22
 High-fiber diet 18.1 17.4 17.0 18.9 1.11 0.64 0.80
  1. aSEM-standard error of the means
  2. bP-value for control vs all direct-fed microbials (DFM) within each diet
  3. cECM-energy corrected milk [(0.327 × kg of milk) + (12.95 × kg of fat) + (7.65 × kg of protein)]
  4. *Significantly (P ≤ 0.05) different from CTL group