Background: Some plants have harmful effects on fungi and bacteria as well as other plants. Incorporating such plant into soil as green manure is effective in reducing population densities of soil pathogens.
Methods and Results: Twenty-three species of green manure crops were cultivated after the harvest of 6-year-old ginseng and then incorporated into the soil at the flowering stage. The following year, the root rot ratio of 2-year-old ginseng and soil chemical properties were investigated. In the absence of green manure addition, the NO3 content, electric conductivity (EC), and K content decreased by 95%, 79% and 65%, respectively. In the presence of green manure addition, P2O5 and NO3 contents reduced by 41% and 25%, respectively. The “survived root ratio” of 2-year-old ginseng significantly increased by 56.2%, 47.5%, and 47.3%, in the Sorghum sudanense, Ricinus communis and Helianthus tuberosus treatment, respectively. In addition, there was a significant increase in the “survived root ratio” in the Secale cereale, Chrysanthemum morifolium, Atractylodes macrocephala, and Smallanthus sonchifolius treatments. The “survived root ratio” of ginseng showed a significant positive correlation with the soil pH and a negative correlation with the NO3 contents, and EC.
Conclusions: Cultivation of plant form the Chrysanthemum family as green manure, using mainly the rhizomes was effective for the control of root rot disease of ginseng.

서 언
 재료 및 방법
  1. 시험 토양
  2. 녹비작물 종류
  3. 녹비작물 생육특성 조사
  4. 녹비작물 토양혼화
  5. 토양이화학성 분석
  6. 인삼 생육특성 및 뿌리썩음병 발생량 조사
  7. 통계처리
 결과 및 고찰
  1. 녹비작물의 생육특성 및 건물 생산량
  2. 녹비작물 환원전의 토양이화학성 변화
  3. 녹비작물 환원후의 토양이화학성 변화
  4. 녹비작물 환원후 인삼 생육 및 뿌리썩음병 발생특성
  5. 토양화학성과 인삼뿌리썩음병 발생과의 상관관계
 감사의 글
 REFERENCES

• 이성우(농촌진흥청 국립원예특작과학원 인삼특작부) | Sung Woo Lee Corresponding author
• 박경훈(농촌진흥청 국립원예특작과학원 인삼특작부) | Kyung Hoon Park
• 이승호(농촌진흥청 국립원예특작과학원 인삼특작부) | Seung Ho Lee
• 장인복(농촌진흥청 국립원예특작과학원 인삼특작부) | In Bok Jang
• Mei Lan Jin(농촌진흥청 국립원예특작과학원 인삼특작부)