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KMID : 1098420200280020142
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Korean Journal of Medicinal Crop Science
2020 Volume.28 No. 2 p.142 ~ p.151
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Soil Chemical Properties, Microbial Community and Ginseng Root Rot in Suppressive and Conducive Soil Related Injury to Continuously Cropped Ginseng
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Lee Sung-Woo
Lee Seung-Ho
Seo Mun-Won
Jang In-Bok
Kwon Ra-Yeong
Heo Hye-Ji
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Abstract
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Background: Suppressive soil inhibits soil-borne diseases if pathogens are present, and ginseng does not show injury even if replanted in the same field.
Methods and Results: Soil chemical properties and microbial community of soil were investigated in soil suppressive and conducive to ginseng root rot. Root rot disease in 2-year-old ginseng was tested by mixing conducive soil, with suppressive or sterilized suppressive soil. The root rot ratio in suppressive soil was 43.3% compared to 96.7% in conducive soil. Biological factors acted to inhibit the root rot because disease ratio was increased in the sterilized suppressive soil compared to that in non-suppressive soil. The suppressive soil had lower pH, nitrate nitrogen and sodium than the conducive soil. Dominat bacteria and fungi (more than 1.0%) were 3 and 17 species in conducive soil and 7 and 23 species in suppressive soil, respectively. The most predominant fungi were Pseudaleuria sp. HG936843 (28.70%) in conducive soil and Pseudogymnoascus roseus (7.52%) in suppressive soil.
Conclusion: Microbial diversity was more abundant in the suppressive soil than in the conducive soil, and the proportion of pathogens (Nectriaceae sp.) causing root rot was significantly lower in the suppressive soil than in the conducive soil.
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KEYWORD
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Panax ginseng, Cylindrocarpon destructans, Microbial Community, Root Rot, Suppressive Soil
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