Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Allelopathic Effects of Catsear (Hypochaeris radicata L.) for the Development of Environmentally-friendly Agricultural Materials

친환경농자재 개발을 위한 서양금혼초(Hypochaeris radicata L.)의 알레로패시 효과

  • 차진우 (제주대학교 식물자원환경전공(농학과)) ;
  • 김현철 (제주특별자치도 한라산연구소) ;
  • 강정환 (제주대학교 식물자원환경전공(농학과)) ;
  • 김태근 (제주대학교 식물자원환경전공(농학과)) ;
  • 정대천 (제주특별자치도 농업기술원) ;
  • 송상철 (제주특별자치도 농업기술원) ;
  • 이희선 (제주대학교 식물자원환경전공(농학과)) ;
  • 송진영 (제주대학교 농학과) ;
  • 송창길 (제주대학교 식물자원환경전공)
  • Received : 2013.11.11
  • Accepted : 2013.12.24
  • Published : 2014.03.30
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Abstract

To evaluate the potential of Hypochoeris radicata L. for the development of environment-friendly organic materials, its growth characteristics, allelopathic effects and antifungal activity was investigated. The growth characteristics of H. radicata L. was investigated by measuring comparative number of shoot and flower, and the diameters of clones in mowing areas and non-mowing areas, respectively. As a result, the number of shoot and flower, and diameters of clones of H. radicata L. grown in mowing areas were much higher than those grown in non-mowing areas. Water extracts of H. radicata L. inhibited seed germination, and shoot, root and root hair growth of 14 test plants including Trifolium pratense, Festuca myuros, Bidens bipinnata and finally reduced heir biomass remarkably. The inhibitory effect of the extract was different depending on the kind and the part of tested plants. The extracts showed high antifungal activity against Pythium spp. and Phytophthora However, it showed comparably less antifungal activity against Rhizoctonia solani than Pythium spp. and Phytophthora. In conclusion, cutting H. radicata L. resulted increase of its vegetative and seed propagation and helped it to form large colony. Also it had an effect on growth of microbes and germination and growth of other plants. Therefore H. radicata L. holds the competitive dominant position in plant ecosystem in Jeju Island and it can be used as candidate of environment-friendly organic materials.

서양금혼초의 군락 형성에 따른 경쟁적 우세원인을 규명하고 친환경농자재 개발을 위한 기초자료로 제공하고자 생육특성과 Allelopathy 효과를 알아보았다. 서양금혼초의 생육특성은 예초지역과 비예초지역간의 묘조(苗條) 수, 지상부 직경과 화주 수를 비교한 결과 예초지역의 묘조(苗條) 수, 지상부의 직경과 화주수가 비예초지역보다 높은 것으로 조사되었고, 서양금혼초의 수용성 추출액에 대한 레드클로버(Trifolium pratense), 들묵새(Festuca myuros), 도깨비바늘(Bidens bipinnata) 등 실험식물 14종 대해 발아와 생장 실험 결과 일반적으로 수용성 추출액의 농도가 증가함에 따라 검정식물의 발아율, 유식물의 뿌리털, shoot, root의 생장이 억제되었고 검정식물의 종류와 부위에 따라 억제정도에 있어서 차이를 보였다. 또한 서양금혼초의 수용성 추출액에 대한 실험곰팡이의 생장에 있어서는 Pythium속, Phytophthora속은 수용성 추출액의 농도가 높아짐에 따라 성장이 억제되는 경향을 보인 반면, Rhizoctonia속인 경우에는 농도가 높아짐에 따라 생장억제 현상이 뚜렷하지 않았다. 이와 같은 결과를 종합하여 보면 서양금혼초의 예초는 서양금혼초의 Split현상을 유도하여 더 많은 영양번식과 종자번식을 일으켜 군락을 형성하고, 서양금혼초에 함유된 allelochemicals에 의해 타 식물체의 발아와 생장, 미생물의 생장 등에 관여하기 때문에 제주도내 생태계에서 경쟁적 우위를 점하고 있으며, 친환경농자재로서의 활용 가능성이 있는 것으로 판단되었다.

Keywords

References

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