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Effects of Medicinal Herb Extracts on In vitro Ruminal Methanogenesis, Microbe Diversity and Fermentation System

  • Kim, Eun Tae (National Institute of Animal Science, RDA) ;
  • Hwang, Hee Soon (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Lee, Sang Min (Easy Bio, Inc.) ;
  • Lee, Shin Ja (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Lee, Il Dong (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Lee, Su Kyoung (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Oh, Da Som (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Lim, Jung Hwa (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University) ;
  • Yoon, Ho Baek (National Institute of Animal Science, RDA) ;
  • Jeong, Ha Yeon (National Institute of Animal Science, RDA) ;
  • Im, Seok Ki (National Institute of Animal Science, RDA) ;
  • Lee, Sung Sill (Division of Applied Life Science (BK21+, IALS), Gyeongsang National University)
  • Received : 2016.01.18
  • Accepted : 2016.03.19
  • Published : 2016.09.01

Abstract

This study was aimed to evaluate the in vitro effects of medicinal herb extracts (MHEs) on ruminal fermentation characteristics and the inhibition of protozoa to reduce methane production in the rumen. A fistulated Hanwoo was used as a donor of rumen fluid. The MHEs (T1, Veratrum patulum; T2, Iris ensata var. spontanea; T3, Arisaema ringens; T4, Carduus crispus; T5, Pueraria thunbergiana) were added to the in vitro fermentation bottles containing the rumen fluid and medium. Total volatile fatty acid (tVFA), total gas production, gas profiles, and the ruminal microbe communities were measured. The tVFA concentration was increased or decreased as compared to the control, and there was a significant (p<0.05) difference after 24 h incubation. pH and ruminal disappearance of dry matter did not show significant difference. As the in vitro ruminal fermentation progressed, total gas production in added MHEs was increased, while the methane production was decreased compared to the control. In particular, Arisaema ringens extract led to decrease methane production by more than 43%. In addition, the result of real-time polymerase chain reaction indicted that the protozoa population in all added MHEs decreased more than that of the control. In conclusion, the results of this study indicated that MHEs could have properties that decrease ruminal methanogenesis by inhibiting protozoa species and might be promising feed additives for ruminants.

Keywords

References

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