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KMID : 1098420100180020065
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Korean Journal of Medicinal Crop Science
2010 Volume.18 No. 2 p.65 ~ p.69
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Effects of Chlorophyll Fluorescence and Photosynthesis Characteristics by Planting Positions and Growth Stage in Panax ginseng C. A. Meyer
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Oh Dong-Joo
Lee Chung-Yeol
Kim Seong-Man
Lee Guan-Ying
Lee Su-Ji
Hwang Dae-Yean
Son Hong-Joo
Won Jun-Yeon
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Abstract
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As cool-season plant, Panax ginseng C. A. Meyer is planted under shade-installation with tall front and low rear. However, at different planting positions, distinct differences come out because ginseng grows at the same position within 3~5 years and the growth circumstance changes a lot by the shade-installation. So, in this study, changes of temperature, photosynthesis and chlorophyll fluorescence with varieties of shading material and planting position were investigated. Light transmittances by polyethylene shade net and silver-coated shading plate as planting materials were measured according to different planting positions. Photosynthetic rate and chlorophyll fluorescence were measured by LI-6400-40 (Li-Cor). According to different planting positions, light intensity was higher in silver-coated shading plate than in polyethylene shade net, and higher at front than rear. Also, photosynthetic rate showed the same tendency, which had a positive correlation to light intensity. But this treatment caused a lower Fo compared with polyethylene shade net because of the stress by light and temperature. Also, Fv/Fm and ETR were higher in silver-coated shading plate. Fo was similar at front and rear according to silver-coated shading plate and ETR was higher at front.
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KEYWORD
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Panax ginseng, Planting Positions, Chlorophyll Fluorescence, Photosynthesis Characteristics, Growth Stage
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