Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effect of Green Manure Crop on Growth and Medicinal Ingredients of Platycodon grandiflorum Radix

풋거름작물에 따른 도라지의 생육 및 약용성분 변화

  • 전승호 (경남과학기술대학교 종자실용화연구소) ;
  • 노일래 (경상대학교 농학과(농업생명과학연구원)) ;
  • 김영국 (농촌진흥청 국립원예특작과학원 인삼특작부) ;
  • 심두보 ((재)하동녹차연구소) ;
  • 조영손 (경남과학기술대학교 농학.한약자원학부)
  • Received : 2018.01.11
  • Accepted : 2018.04.05
  • Published : 2018.05.31
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Abstract

This study was conducted to elucidate the effects of green manure crop on growth characteristics and saponin contents of Platycodin grandiflorum Ridix roots for organic farming. Rye, hairy vetch and rye+hairy vetch were cultivated as green manure crops with several different methods before transplanting P. grandiflorum Radix. In root width and number of fine-roots, when the highest scores (23.9 mm, 25.7) was recorded in rye pre-cultibated plot in $2^{nd}$ year cultivation. Fresh weight of the Platycodin grandiflorum Ridix root was no significant difference among the different green manure crop treatments, but fresh weights of the Platycodin grandiflorum Ridix root of all green manure crop treatments were higher than that of control. The total content of saponin was highest detected in Platycodin grandiflorum Ridix roots of the hairy vetch plot (1,106 mg/100 g) and rye plot (1,693 mg/100 g) in $1^{st}$ and $2^{nd}$ year cultivation, respectively. Therefore, we confirmed that precultivation of the green manure crops showed significant differences in the growth characteristics and saponin contents of the Platycodin grandiflorum Ridix root, and growth and saponin contents in the Platycodin grandiflorum Ridix root of rye precultivated plot was much higher in $2^{nd}$ year cultivation than $1^{st}$ year cultivation.

이 연구는 도라지의 유기재배를 위하여 3년근 이식 예정지에 풋거름 작물 재배에 따른 도라지 뿌리의 생육특성 및 사포닌 함량에 미치는 영향을 구명하고자 실시되었다. 생육특성에서는 기재배지에서의 뿌리의 직경 및 곁뿌리 수는 호밀 재배구에서 가장 굵거나 많았으며, 뿌리 생체중은 풋거름작물 재배구간 차이는 없었으나, 대조구에 비해 높게 나타났다. 도라지 뿌리의 무기성분 함량에서는 무기성분별 유의성이 있는 것으로 나타났으며 특히, 기재배지에서의 호밀 처리구에서 높은 함량이 나타났다. 사포닌 함량의 변화에서는 기재배지에서는 호밀 재배구에서 모든 사포닌 함량이 가장 높은 함량으로 나타났으며, 새재배지에서는 헤어리베치 재배구에서 높은 함량을 나타냈다. 대조구에 비해 풋거름작물 재배구의 기재배지와 새재배지 모든 재배구에서 사포닌의 함량이 높게 나타났다. 따라서 도라지 유기재배 시 풋거름작물에 따른 뿌리의 생육 특성 및 약리성의 변화 등의 유의적인 차이가 나타나는 것을 확인할 수 있었으며, 연차 간 재배 시 호밀 재배구에 생육 및 약리성이 우수한 것으로 나타났다.

Keywords

References

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