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KMID : 1098420190270040284
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Korean Journal of Medicinal Crop Science
2019 Volume.27 No. 4 p.284 ~ p.291
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Effect of Green Manure Incorporation and Solarization on Root Rot Disease of 3-year-old Ginseng in Soil of Continuous Cropping Ginseng
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Seo Moon-Won
Lee Sung-Woo
Lee Seung-Ho
Jang In-Bok
Heo Hye-Ji
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Abstract
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Background: Ginseng root rot disease, caused by Cylindrocarpon destructans and Fusarium solani is a major cause of replant failure in continuous cropping ginseng.
Methods and Results: To control replant injury in soil infected with C. destructans and F. solani, biosolarization was performed by covering the plot with transparent polyethylene film after adding green manure of maize and sunflower for the summer season. Per 10 a, fresh and dry weight of maize was 10.1 and 2.5 tons, respectively, and that of sunflower was 8.1 tons and 1.2 tons, respectively. Mean maximum temperature at 20 ㎝ depth was 33.2℃, 41.5℃ and 41.8℃ in the control, maize-incorporated and sunflower-incorporated plots, respectively. The elapsed time over 40℃ was 36.4 h in the maize-incorporated plot and 77.3 h in the sunflower-incorporated plot. Biosolarization increased NO3 content in soil, while content of organic matter, Ca, and Mg was decreased. Electrical conductivity, NO3 and P2O5 in soil significantly increased after two years of biosolarization. The number of spores of C. destructans in soil was significantly decreased by biosolarization, and sunflower treatment was more effective than maize treatment in decreasing the number of spores. Root yield of 3-year-old ginseng was significantly increased by biosolarization, however, there was no significant difference between maize and sunflower treatments. Rate of root rot in 3-year-old ginseng decreased to 16.5% with the incorporation maize and 5.0% with the incorporation of sunflower, while that in control 25.6%.
Conclusions: Biosolarization was effective in inhibiting ginseng root rot by decreasing the density of root rot disease and improving soil chemical properties.
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KEYWORD
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Panax ginseng, Biosolarization, Cylindrocarpon destructans, Green Manure Crop, Root Rot Disease
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