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Relationship between rumen odd and branched chain fatty acids and fermentation characteristics as studied in vitro

  • B. Vlaeminck (a1), V. Fievez (a1), H. van Laar (a2) and D. Demeyer (a1)

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Rumen microbes contain a high proportion (20 to 50%) of their fatty acids (FA) as odd and branched chain fatty acids (OBCFA; C15:0, iso C15:0, anteiso C15:0, C17:0; iso C17:0; anteiso C17:0 and C17:1) and different bacterial classes have distinctive OBCFA ‘fingerprints’. As OBCFA make up around 5% of FA in milk, it has been suggested that there is scope for these compounds to be used in on-farm diagnostic milk-based tests in relation to the rumen fermentation pattern. Correlations of milk OBCFA with rumen fermentation pattern were recently shown (Vlaeminck et al., 2002). In the current in vitro study, the potential of rumen OBCFA to predict the production of volatile fatty acids (VFA) was evaluated.

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Fievez, V., Dohme, F., Daneels, M., Raes, K. and Demeyer, D. 2002. Fish oils as potent rumen methane inhibitors and associated effects on rumen fermentation in vitro and in vivo. Animal Feed Science and Technology, in press.
Vlaeminck, B., Bruinenberg, M., Fievez, V., Raes, K. and Demeyer, D. 2002. Milk odd and branched chain fatty acids in relation to dietary NDF content and rumen fermentation pattern. Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen 67 (4): 319322.

Relationship between rumen odd and branched chain fatty acids and fermentation characteristics as studied in vitro

  • B. Vlaeminck (a1), V. Fievez (a1), H. van Laar (a2) and D. Demeyer (a1)

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