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Essential oils effect on rumen fermentation and biohydrogenation under in vitro conditions

Author

Listed:
  • M. Gunal

    (Department of Animal Science, Süleyman Demirel University, Isparta, Turkey)

  • A. Ishlak

    (Department of Animal Science, Food and Nutrition, Southern Illinois University, Carbondale, USA)

  • A.A. AbuGhazaleh

    (Department of Animal Science, Food and Nutrition, Southern Illinois University, Carbondale, USA)

  • W. Khattab

    (Nutrition and Clinical Nutrition Department, Faculty of Veterinary Medicine, Benha University Moshtohor Tukh, Qalubia, Egypt)

Abstract

The effects of adding essential oils (EO) at different levels (125, 250, 500 mg/l) on rumen fermentation and biohydrogenation were examined in a rumen batch culture study. Treatments were: control without EO (CON), control with anise oil (ANO), cedar wood oil (CWO), cinnamon oil (CNO), eucalyptus oil (EUO), and tea tree oil (TEO). Essential oils, each dissolved in 1 ml of ethanol, were added to the culture flask containing 40 ml of buffer solution, 2 ml of reduction solution, 10 ml of rumen fluid, 25 mg of soybean oil, and 0.5 g of the diet. After 24 h of incubation in a water batch at 39°C, three samples were collected from each flask and analyzed for ammonia-N, volatile fatty acids (VFA), and fatty acids (FA). Expect for CNO, the proportions of acetate, propionate, and acetate to propionate ratios were not affected (P > 0.05) by EO addition. Addition of CWO, CNO, and TEO reduced total VFA concentrations (P < 0.05) regardless of dose level. The ammonia-N concentration was greater in cultures incubated with EO regardless of dose level. Compared with the CON, the concentrations of C18:0 and trans C18:1 were reduced (P < 0.05) with EO addition regardless of dose level. Compared with the CON, the concentration of linoleic acid was greater (P < 0.05) when EO were added at 500 mg/l. EO tested in this study had no effects on VFA profile but significantly reduced the formation of biohydrogenation products (C18:0 and trans C18:1).

Suggested Citation

  • M. Gunal & A. Ishlak & A.A. AbuGhazaleh & W. Khattab, 2014. "Essential oils effect on rumen fermentation and biohydrogenation under in vitro conditions," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 59(10), pages 450-459.
    • Handle: RePEc:caa:jnlcjs:v:59:y:2014:i:10:id:7708-cjas
    DOI: 10.17221/7708-CJAS
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    Cited by:

    1. K. Karásková & P. Suchý & E. Straková, 2015. "Current use of phytogenic feed additives in animal nutrition: a review," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 60(12), pages 521-530.

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