Comparison of 3 methods for estimating enteric methane and carbon dioxide emission in nonlactating cows

Journal of Animal Science
M DoreauC Martin

Abstract

Among techniques for estimating enteric methane (CH4) emission by ruminants, open-circuit respiration chambers (OC), the use of a gas tracer (SF6), and the GreenFeed (GF) device are the most commonly used. In this study, we compared these techniques in 8 dry cows receiving a diet made of 70% hay and 30% concentrates given in limited and constant amounts, in a 15-wk experiment. Two periods in free stalls for SF6 and GF and in chambers for OC were used; in addition, SF6 was determined in chambers for 1 period. Methane emission (g/d) and CH4 yield (g/kg DMI) were higher (P < 0.0001) for OC than for SF6 and GF (367, 310, and 319 g/d for OC, SF6, and GF, respectively). The difference between OC and GF was related to a difference in post-prandial rate of gas emission. The between-animal coefficient of variation of CH4 emission was higher for SF6 than for OC and GF (20.8, 13.5, and 12.0% on average, respectively). Correlation coefficients between OC and SF6 were high and significant for CH4 emission and CH4 yield (r = 0.782 and r = 0.717, respectively; P < 0.05), but not significant between OC and GF, or between SF6 and GF. Correlation coefficients were highly significant for SF6 determined either in free stalls or in chambers (r = 0....Continue Reading

References

Jul 1, 1976·The British Journal of Nutrition·R M MurrayR A Leng
Mar 23, 2012·Animal : an International Journal of Animal Bioscience·C MartinC S Pinares-Patiño
Mar 17, 2015·Journal of Dairy Science·P HuhtanenS Zimmerman
Aug 26, 2015·Animal : an International Journal of Animal Bioscience·J I VelazcoR S Hegarty
Oct 7, 2015·Journal of Animal Science·J GuyaderC Martin
Aug 16, 2017·Animal : an International Journal of Animal Bioscience·M DoreauC Martin

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Citations

Oct 20, 2018·Animal : an International Journal of Animal Bioscience·R Muñoz-TamayoH Kettle
Aug 1, 2021·Tropical Animal Health and Production·Medardo Díaz-CéspedesCarlos Gómez

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