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KMID : 1098420070150030194
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Korean Journal of Medicinal Crop Science
2007 Volume.15 No. 3 p.194 ~ p.198
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Effect of Blue and Yellow Polyethylene Shading Net on Growth Characteristics and Ginsenoside Contents in Panax ginseng C. A. Meyer
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Lee Sung-Woo
Kim Geum-Soog
Lee Min-Jung
Hyun Dong-Yun
Pack Chun-Geon
Park Ho-Ki
Cha Seon-Woo
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Abstract
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Yield and ginsenoside contents of ginseng (Panax ginseng C. A. Meyer) is affected by light intensity and quality, and the color and the thickness of PE shading net when PE net is utilized for shading material. This study was carried out to investigate the effect of light quality on root yield and ginsenoside contents off-year-old ginseng by using polyethylene shading net with each blue and yellow color, Spectral irradiance under blue and yellow shading net showed the peak at 498 nm and 606 nm, respectively, which made distinct difference in light quality. Heat injury ratio of blue shading net was increased distinctly more than that of yellow shading net in summer season because of higher transmitted quantum (23%)and air temperature (0.3 ^{circ}C) in blue shading net than those of yellow shading net. Chlorophyll content and leaf area under yellow shading net were higher than those of blue shading net, and its heat injury ratio was lower than those of blue. These effects may led to 48% higher increase of root yield under yellow shading net than that under blue shading net. The content of total ginsenoside in taproot was not significantly differed between blue and yellow shading net, while the content in lateral and fine root was significantly increased in blue shading net compared to yellow shading net. PDM ratio of blue shading net showed more significant increase in lateral root than that of yellow shading net. All of Rb_1/Rg_1 ratio in three parts of root under blue shading net was higher than that of yellow shading net, but there were no significant increase in the ratio of lateral root.
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KEYWORD
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Panax ginseng, Blue and yellow shading, Spectral irradiance, Quantum, Growth, Root yield, Ginsenoside
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