Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Allelopathic Effects of Crimson Clover, Hariy Vetch and Rye on Germination and Radicle Elongation of Several Crops

크림손클로버, 헤어리베치, 호밀 추출물이 몇 가지 작물의 종자 발아와 유근 생장에 미치는 allelopathy 효과

  • Lee, Ji-Hyun (Department of Agronomy, Gyenogsang National University) ;
  • Lee, Byung-Mo (Organic Agriculture Division, National Academy of Agricultural Science, RDA) ;
  • Jeon, Seung-Ho (Department of Agronomy, Gyenogsang National University) ;
  • Chung, Jong-Il (Department of Agronomy, Gyenogsang National University) ;
  • Kim, Min-Chul (Department of Agronomy, Gyenogsang National University) ;
  • Shim, Sang-In (Department of Agronomy, Gyenogsang National University)
  • Received : 2010.08.27
  • Accepted : 2010.10.19
  • Published : 2010.12.30
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Abstract

Crimson clover (Trifolium incarnatum), hairy vetch (Vicia villosa) and rye (Secale cereale) are common leguminous cover crops. Because they contain water-soluble allelopathic substances that show a variable level in tissue depending on growth stage of the plants, the weed inhibition effects are dependent on the growth stage of cover crops. This study investigated the allelopathic effects of crimson clover, hairy vetch and rye on soybean, radish, oilseed rape and lettuce seeds germination and seedling growth. We used extract that were prepared from the shoots of crimson clover, hairy vetch and rye at different growth stages, vegetative growth stage, flowering stage, and fruiting stage. Applications of aqueous extracts from three growth stage of cover crops strongly affected to oilseed rape and lettuce seeds germination but the treatment resulted in a slight inhibition of the germination in soybean and radish. Radical length was more sensitive to aqueous extracts than seed germination rate. Especially, three cover crops extracts at vegetative growth stage highly inhibited seedling root growth of oilseed rape and lettuce by over 80% and 90% respectively. Furthermore, the $GR_{50}$ values were lowest in the treatment of extracts from vegetative growth stage and the level of phenolics was decreased by the order of vegetative growth stage, flowering stage and fruiting stage.

피복작물의 생육 단계에 따른 allelopathy 효과의 차이를 알아보기 위해, 각 피복작물의 영양생장기, 개화기, 결실기에 채취한 시료로 부터 추출한 추출물을 이용해 콩, 무, 유채, 상추의 발아에 미치는 영향을 확인하였다. 콩과 무에서는 각 피복작물 추출물의 처리구에서 발아율에 별다른 차이를 나타내지 않았으나, 유채에서는 크림손클로버의 개화기 20% 추출물, 헤어리베치의 영양생장기, 개화기, 결실기 20% 추출물, 호밀의 영양생장기 20% 추출물들에서 20% 이상의 발아 억제가 나타났으며, 상추는 영양생장기의 크림손클로버와 헤어리베치의 20% 추출물 처리에서 발아세가 낮게 나타났다. 피복작물의 영양생장기 추출물에서 유근 생장 억제율이 가장 높았으며 $GR_{50}$ 값도 낮게 나타났다. 피복작물 추출물의 총 페놀화합물 함량도 영양생장기 때 가장 높았고, 결실기로 생육이 진전되면서 감소되었다. HPLC 분석 결과 크림손클로버 추출물에서 검출 된 p-hydroxybenzoic acid를 제외한 나머지 phenolic acid 함량들은 총 페놀화합물의 함량과 다른 경향을 보였으며, 헤어리베치 추출물에서는 coumarin, 호밀 추출물에서는 BOA와 caffeic acid를 제외한 나머지 물질들이 개화기에서 가장 높은 함량을 나타냈다. 그러나 크림손클로버와 호밀 추출물에서 분석 물질들의 총 함량은 영양생장기 추출물에서 가장 높게 나타났다.

Keywords

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