Communication Dans Un Congrès Année : 2017

Enteric methane emissions from ruminants fed forages: Role of tannins content, a meta-analysis

Résumé

Enteric methane emission by ruminants fed forages is highly variable and depends on forage composition, intake and digestibility. In addition, plant secondary compounds such as tannins have antimethanogenic properties; however, the mitigating effect of tannins on CH4 is inconsistent. A meta-analysis approach was used to compare the effects of different forages, supplemented or not with tannins, fed to ruminants on CH4 emission. Tannin content (TAN, condensed or hydrolysable), averaged 35.6 (sd =53.0) g/kg DM and varied from 0 to 199 g/kg DM, for 19 experiments and 53 treatments. Methane production, expressed per kg of digestible OMI (g/kg DOMI) significantly decreased when feeding level (FL, calculated as DM intake % liveweight) increased and when NDF content of the forage decreased. Moreover, tannins content (g/kg DM) decreasing effect on methane emission was significant. The effect of tannins for mitigating CH4 emission is in agreement with previous studies, but in the present study the impact of tannins was lower, probably due to accounting for decreasing effect of FL and increasing effect of NDF effects in the equation and to small relations between these factors.

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Dates et versions

hal-01830338 , version 1 (05-06-2020)

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Identifiants

  • HAL Id : hal-01830338 , version 1
  • PRODINRA : 434737

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Maguy Eugène, Harry Archimède, Michel Doreau, Sylvie Giger-Reverdin, Daniel Sauvant. Enteric methane emissions from ruminants fed forages: Role of tannins content, a meta-analysis. International symposium on Emissions of Gas and Dust from Livestock (EmiLi), May 2017, Saint-Malo, France. 1 p. ⟨hal-01830338⟩
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