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Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen

Author

Listed:
  • D. Jalč

    (Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovak Republic)

  • M. Čertík

    (Institute of Biotechnology and Food Sciences, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic)

  • K. Kundríková

    (Institute of Biotechnology and Food Sciences, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, Slovak Republic)

  • P. Kubelková

    (Research Institute of Animal Science, Prague-Uhříněves, Czech Republic)

Abstract

The objective of this study was to examine the effect of microbial oil (MO, n-6 fatty acids) and fish oil (FO, n-3fatty acids) used in their blends as supplements (5% wt/wt) to the diet containing 80% of hay and 20% of barley on rumen fermentation and lipid metabolism in artificial rumen. Overall, three different ratios of n-6 and n-3 fatty acids (1:1, 3:1, and 5:1) as the blends of MO and FO were used. Two similar consecutive experiments were carried out within 2 months. Each experiment lasted for 12 days with 6 days of stabilization period. The addition of all three oil blends did not affect the parameters of fermentation such as degradation of dry matter (DM), detergent fibre, total gas production, but increased the degradation of cellulose and hemicellulose in the diets. The supplementation of oil blends to the diet insignificantly (NS) decreased the methane production (mostly the n-6/n-3 ratio 1:1, about 23.5%), increased (P < 0.01) mol% of propionate (mostly the n-6/n-3 ratio 1:1, about 24.1%) and decreased (P < 0.05) mol% of acetate (mostly the n-6/n-3 ratio, 1:1, about 7.7%). The lipid metabolism in artificial rumen was also affected, when the oil blends increased (P < 0.001) the concentration of total fatty acids (FA) and long-chain FA (LCFA) in effluent. The concentration (mg/g rumen fluid DM) of trans (trans 11 C18:1, TVA-vaccenic acid), cis C18:1 isomers and CLA-conjugated linoleic acid (cis 9, trans 11 C18:2) was also increased (P < 0.001) by the oil blends. Finally, the oil blends caused the incomplete FA biohydrogenation by an increase in TVA concentration and TVA/C18:0 ratio in effluent in artificial rumen.

Suggested Citation

  • D. Jalč & M. Čertík & K. Kundríková & P. Kubelková, 2009. "Effect of microbial oil and fish oil on rumen fermentation and metabolism of fatty acids in artificial rumen," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(5), pages 229-237.
    • Handle: RePEc:caa:jnlcjs:v:54:y:2009:i:5:id:1765-cjas
    DOI: 10.17221/1765-CJAS
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    Citations

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    Cited by:

    1. T.J. Guo & J.Q. Wang & D.P. Bu & K.L. Liu & J.P. Wang & D. Li & S.Y. Luan & X.K. Huo, 2010. "Evaluation of the microbial population in ruminal fluid using real time PCR in steers treated with virginiamycin," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(7), pages 276-285.
    2. A. Cieslak & J. Kowalczyk & M. Czauderna & A. Potkanski & M. Szumacher-Strabel, 2010. "Enhancing unsaturated fatty acids in ewe's milk by feeding rapeseed or linseed oil," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(11), pages 496-504.
    3. T. Laho & Z. Váradyová & K. Mihaliková & S. Kišidayová & Z. Adamechová & M. Čertík & D. Jalč, 2011. "Prefermented cereals containing fungal gamma-linolenic acid and their effect on rumen metabolism in vitro," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 56(7), pages 325-335.

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