Journal of Ginseng Research
- Volume 22 Issue 3
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- Pages.161-167
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- 1998
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- 1226-8453(pISSN)
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- 2093-4947(eISSN)
Seasonal Growth and Root Respiration of North American Ginseng
- John, T.A. Proctor (Department of Horticultural Science, University of Guelph) ;
- Dean, Louttit (Department of Horticultural Science, University of Guelph) ;
- Jirong, Jiao (Department of Horticultural Science, University of Guelph)
- Published : 1998.09.01
Abstract
American ginseng plants (Panax quinquefolium L.) of various ages were harvested every two weeks during each of three growing seasons and dry matter yield of components and root respiration determined. Shoot dry weight was about 0.5 g, 2.5 g and 4 g for 2, 3 and 4-year-old plants, respectively and fruit dry weight was as much as 50% of this in 3- and 4-year-.old plants. Root dry weight decrease by 30~50% as shoots emerged and at the end of the season was about 2 g, 3.5 g and 5 g in 2, 3, 4 and 5-year-old plants, respectively. Shoot and root dry weight were linearly related with an approximate 1:2 ratio. Root respiration rate at 2