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KMID : 1098420040120060483
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Korean Journal of Medicinal Crop Science
2004 Volume.12 No. 6 p.483 ~ p.489
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Seasonal Changes of Growth and Extract Content of Roots in Panax ginseng C. A. Meyer
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Lee Sung-Woo
Kang Seung-Weon
Seong Nak-Sul
Hyeon Geun-Soo
Hyun Dong-Yun
Kim Young-Chang
Cha Seon-Woo
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Abstract
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Monthly changes of underground growth and ethanol extract content was investigated from April to September in Korean ginseng of 4, 5 and 6 year-old. Taproot’’s length was repeatedly reduced and recovered without increasing by growth duration, while it’’s diameter was gradually increased until September of harvest time. Top weight reached to the peak on July, and decreased gradually until harvest time. Root weight of 4, 5 and 6-year-old ginseng was decreased on May, but increased gradually until harvest time except 6-year-old ginseng decreased after July. Relative growth rate (RGR) of root per plant was low on May and August, but high on June, July, and September in 4, 5 and 6 year-old ginseng. RGR of 4 and 5-year-old ginseng in each lateral and fine root showed distinct changes by month, while those showed little seasonal changes in 6 year-old ginseng. Ratio of root above 60g on september was 23%, 60% and 69%, respectively, among 4, 5 and 6 year-old ginseng. Moisture content of root was gradually decreased until september without significant difference from July to september in 4, 5 and 6 year-old ginseng, and its descending order on september was 4, 5 and 6 year-old ginseng. Hardness of taproot was decreased on May, but increased until september in 4 and 5 year-old ginseng, while that of 6 year-old ginseng was gradually decreased from August to september. Extract content of 4, 5 and 6 year-old ginseng in taproot and lateral root was distinctly decreased from March to June, but gradually increased until September. Although extract content of March and May in 4 year-old ginseng on showed higher than that of 5 and 6 year-old ginseng, it of September didn’’t show significant difference among 4, 5 and 6 year-old ginseng.
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KEYWORD
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Panax ginseng, root growth, relative growth rate, moisture content, hardness, extract content
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