Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effects of Coconut Materials on In vitro Ruminal Methanogenesis and Fermentation Characteristics

  • Kim, E.T. (Dairy Science Division, National Institute of Animal Science, Rural Development Administration) ;
  • Park, C.G. (Resources Development Institute) ;
  • Lim, D.H. (Dairy Science Division, National Institute of Animal Science, Rural Development Administration) ;
  • Kwon, E.G. (Dairy Science Division, National Institute of Animal Science, Rural Development Administration) ;
  • Ki, K.S. (Dairy Science Division, National Institute of Animal Science, Rural Development Administration) ;
  • Kim, S.B. (Rural Development Administration) ;
  • Moon, Y.H. (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Shin, N.H. (Gyengsangnamdo Livestock Veterinary Research Institute) ;
  • Lee, S.S. (Division of Applied Life Science, Graduate School of Gyeongsang National University (Institute of Agriculture and Life Science))
  • Received : 2014.03.26
  • Accepted : 2014.08.31
  • Published : 2014.12.01
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Abstract

The objective of this study was to evaluate the in vitro effects of coconut materials on ruminal methanogenesis and fermentation characteristics, in particular their effectiveness for mitigating ruminal methanogenesis. Fistulated Holstein cows were used as the donor of rumen fluid. Coconut materials were added to an in vitro fermentation incubated with rumen fluid-buffer mixture and timothy substrate for 24 h incubation. Total gas production, gas profiles, total volatile fatty acids (tVFAs) and the ruminal methanogens diversity were measured. Although gas profiles in added coconut oil and coconut powder were not significantly different, in vitro ruminal methane production was decreased with the level of reduction between 15% and 19% as compared to control, respectively. Coconut oil and coconut powder also inhibited gas production. The tVFAs concentration was increased by coconut materials, but was not affected significantly as compared to control. Acetate concentration was significantly lower (p<0.05), while propionate was significantly higher (p<0.05) by addition of the coconut materials than that of the control. The acetate:propionate ratio was significantly lowered with addition of coconut oil and coconut powder (p<0.05). The methanogens and ciliate-associated methanogens in all added coconut materials were shown to decrease as compared with control. This study showed that ciliate-associated methanogens diversity was reduced by more than 50% in both coconut oil and coconut powder treatments. In conclusion, these results indicate that coconut powder is a potential agent for decreasing in vitro ruminal methane production and as effective as coconut oil.

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References

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