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Effects of Mustard Seeds and Powder on In vitro Ruminal Fermentation Characteristics and Methane Production

겨자종자와 겨자분의 첨가가 반추위 발효성상과 메탄생성에 미치는 영향

  • 이강연 (농촌진흥청 국립축산과학원) ;
  • 김경훈 (농촌진흥청 국립축산과학원) ;
  • 백열창 (농촌진흥청 국립축산과학원) ;
  • 옥지운 (농촌진흥청 국립축산과학원) ;
  • 설용주 (농촌진흥청 국립축산과학원) ;
  • 한기준 (농촌진흥청 국립축산과학원) ;
  • 박근규 (건국대학교 동물자원센터) ;
  • 류호태 (자연과기술(주)) ;
  • 이상석 (순천대학교 동물자원과학과) ;
  • 전체옥 (중앙대학교 자연과학대학) ;
  • 오영균 (농촌진흥청 국립축산과학원)
  • Received : 2012.04.30
  • Accepted : 2013.02.26
  • Published : 2013.02.28

Abstract

The purpose of this study was to investigate the effects of mustard, which contains allyl isothiocyanate, on ruminal fermentation and methane emission in vitro. To this end, diluted ruminal fluid(30ml) was incubated anaerobically at $39^{\circ}C$ or 6, 12, and 24 h with or without seeds or powdered mustard. Either mustard seed or powdered mustard was weighed and serially (0, 3.33, 5.00, 6.67, and 8.33 g/L) mixed with ruminal fluid. Ammonia-N was increased (P < 0.05) by mustard treatment in a dose dependent manner. Regardless of concentration or form, mustard increased (P < 0.05) total VFA content but decreased (P < 0.01) pH compared to control group. Molar proportion of acetate (A) was decreased (P < 0.05) whereas propionate (P) was increased (P < 0.05) by mustard treatment, thereby A:P ratio was decreased (P < 0.05) compared to control group. Total gas production was increased (P < 0.01) in a linear manner by mustard treatment compared to control group. There was no effect of mustard powder, except 8.33 g/L level at 6 h, on methane emission. However, at 24 h, methane emission was reduced (P < 0.05) by 4.77% and 11.54% with 6.67 g/L and 8.33 g/L of mustard seeds supplementation, respectively. Altogether, these results suggest that mustard seeds containing allyl isothiocyanate may reduce methane production without disturbing ruminal fermentation.

본 연구는 allyl isothiocyanate를 함유한 겨자종자와 겨자분을 이용하여 반추위 발효성상과 메탄 배출에 미치는 영향을 알아보고자 실시하였다. 완충용액과 혼합한 반추위액 30 ml에 겨자종자와 겨자분을 첨가하여 $39^{\circ}C$에서 6, 12, 그리고 24시간 동안 배양하였다. 겨자종자와 겨자분은 각각 0, 3.33, 5.00, 6.67 및 8.34 g/L 첨가하였다. 총 가스 생성량은 모든 처리구에서 유의적으로 증가하였다(P<0.01). 메탄 배출량은 겨자종자를 6.67 g/L 및 8.34 g/L 첨가하였을 때 각각 4.77% 및 11.54% 감소하였다(P<0.05). 겨자분에서는 배양 6시간에 8.34 g/L를 첨가하였을 때를 제외하고 효과가 나타나지 않았다. 반추위 발효성상에 있어, pH는 대조구와 비교하여 모든 처리구에서 낮게 나타났다(P<0.01). 암모니아의 농도는 첨가량이 증가할수록 유의적으로 증가하였다(P<0.01). 총 휘발성 지방산 농도는 모든 처리구가 대조구보다 높았다(P<0.05). 대조구와 비교하여 acetate의 농도는 감소하였고, propionate의 농도는 증가하였다(P<0.05). Acetate와 propionate 변화로 인해 A:P ratio 역시 감소하였다(P<0.05). 본 시험 결과로 보아, allyl isothiocyanate를 함유한 겨자종자를 첨가하였을 때 반추위 발효성상에 영향을 미치지 않고 메탄 생성량을 감소시킬 수 있을 것으로 생각된다.

Keywords

References

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