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Effects of essential oils on ruminal microorganisms and their protein metabolism
F M McIntosh1, P Williams, R Losa
1Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, United Kingdom. FMM@ROWETT.AC.UK
Applied and Environmental Microbiology
|August 7, 2003
Abstract:
A commercial blend of essential oil (EO) compounds was added to a grass, maize silage, and concentrate diet fed to dairy cattle in order to determine their influence on protein metabolism by ruminal microorganisms. EO inhibited (P < 0.05) the rate of deamination of amino acids. Pure-culture studies indicated that the species most sensitive to EO were ammonia-hyperproducing bacteria and anaerobic fungi.