Methane emissions from beef cattle: Effects of fumaric acid, essential oil, and canola oil

  • Beauchemin K
  • McGinn S
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Abstract

The objective of this study was to iden-tify feed additives that reduce enteric methane emis-sions from cattle. We measured methane emissions, total tract digestibility (using chromic oxide), and rumi-nal fermentation (4 h after feeding) in growing beef cattle fed a diet supplemented with various additives. The experiment was designed as a replicated 4 × 4 Latin square with 21-d periods and was conducted using 16 Angus heifers (initial BW of 260 ± 32 kg). Treatments were: control (no additive), fumaric acid (175 g/d) with sodium bicarbonate (75 g/d), essential oil and spice ex-tract (1 g/d), or canola oil (4.6% of DMI). The basal diet consisted of 75% whole-crop barley silage, 19% steam-rolled barley, and 6% supplement (DM basis). Four large chambers (2 animals fed the same diet per cham-ber) were equipped to measure methane emissions for 3 d each period. Adding canola oil to the diet decreased (P = 0.009) total daily methane emissions by 32% and tended (P = 0.09) to decrease methane emissions as a

Author-supplied keywords

  • Beef cattle
  • Canola oil
  • Essential oil
  • Fumaric acid
  • Greenhouse gas
  • Methane

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