Background: Some phenolics detected in the soil may inhibit the seed germination and seedling growth of ginseng (Panax ginseng). This study investigated the effect of irrigation and ginseng root residue addition on the soil microbial community and root rot disease in 2-year-old ginseng.
Methods and Results: Each 20 ℓ pot was filled with soil infected with ginseng root rot pathogens, and irrigated daily with 2 ℓ of water for one month. After the irrigation treatment, ginseng fine root powder was mixed with the irrigated soil at a rate of 20 g per pot. In descending order, NO3 −, electric conductivity (EC), exchangeable Na (Ex. Na) and K (Ex. K) decreased due to irrigation. In descending order, NO3 −, EC, Ex. K, and available P2O5 increased with the additon of ginseng powder to the soil. The abundance of Trichoderma crassum decreased with irrigation, but increased again with the incorporation of ginseng powder. The abundance of Haematonectria haematococca increased with irrigation, but decreased with the incorporation of ginseng powder. The abundance of Cylindrocarpon spp. and Fusarium spp., which cause ginseng root rot, increased with the incorporation of ginseng powder. The abundance of Arthrobacter oryzae and Streptomyces lavendulae increased with irrigation. The abundance of Streptomyces lavendulae decreased, and that of Arthrobacter spp. increased, with the incorporation of ginseng powder. Aerial growth of ginseng was promoted by irrigation, and ginseng root rot increased with the incorporation of ginseng powder.
Conclusions: Ginseng root residues in the soil affected soil nutrients and microorganisms, and promoted ginseng root rot, but did not affect the aerial growth of ginseng.

ABSTRACT
 서 언
 재료 및 방법
  1. 시험토양
  2. 관수 및 인삼 세근 분말 토양혼화
  3. 토양 이화학성 분석
  4. 토양미생물 다양성 분석
  5. 묘삼 정식 및 인삼 생육특성 조사
  6. 통계분석
 결과 및 고찰
  1. 관수 및 인삼 세근 분말 처리에 따른 토양이화학성의 변화
  2. 관수 및 인삼 세근 분말 처리에 따른 토양의 미생물상변화
  3. 관수 및 인삼 세근 분말 처리에 따른 인삼의 지상부 생육특성
  4. 관수 및 인삼 세근 분말 처리에 따른 인삼의 뿌리썩음병발생 특성
 REFERENCES

• 이성우(농촌진흥청 국립원예특작과학원 인삼특작부) | Sung Woo Lee (Department of Herbal Crop Research, NIHHS, RDA) Corresponding author
• 이승호(농촌진흥청 국립원예특작과학원 인삼특작부) | Seung Ho Lee (Department of Herbal Crop Research, NIHHS, RDA)
• 서문원(농촌진흥청 국립원예특작과학원 인삼특작부) | Moon Won Seo (Department of Herbal Crop Research, NIHHS, RDA)
• 박경훈(농촌진흥청 국립원예특작과학원 인삼특작부) | Kyung Hoon Park (Department of Herbal Crop Research, NIHHS, RDA)
• 장인복(농촌진흥청 국립원예특작과학원 인삼특작부) | In Bok Jang (Department of Herbal Crop Research, NIHHS, RDA)