Effects of essential oils on ruminal microorganisms and their protein metabolism.
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.
McIntosh
F M
FM
Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, United Kingdom. FMM@ROWETT.AC.UK
Williams
P
P
Losa
R
R
Wallace
R J
RJ
Beever
D A
DA
Newbold
C J
CJ
D000818:Animals; D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development; D001426:Bacterial Proteins / Q000378:metabolism*; D002417:Cattle; D005260:Female; D009822:Oils, Volatile / Q000494:pharmacology*; D012417:Rumen / Q000382:microbiology*
D001426:Bacterial Proteins; D009822:Oils, Volatile