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KMID : 1098420190270040271
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Korean Journal of Medicinal Crop Science
2019 Volume.27 No. 4 p.271 ~ p.277
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Investigation of Emergence Conditions and Plug Seedling Periods in Rehmannia glutinosa (Gaertn.) Libosch. ex Steud.
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Lee Sang-Hoon
Koo Sung-Cheol
Hur Mok
Lee Woo-Moon
Park Min-Su
Han Jong-Won
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Abstract
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Background: Rehmannia glutinosa (Gaertn.) Libosch. ex Steud. has long been used as a traditional medicinal plant in Korea. This study was carried out to investigate the emergence conditions during the seedling periods in R. glutinosa.
Methods and Results: The rhizomes of R. glutinosa variety (Jihwang 1) were harvested in the 22, March, 2018. The rhizomes were sown on in 50-cell plug trays. The emergence rates of seedlings at 15℃, 20℃, 25 - 40℃, and 45℃ treatment seedling were 1.3%, 96%, 100% and 0%, respectively. Rhizome rot was occurred at the temperature of 15℃ and 45℃. The emergence rates of seedlings in high moisture (HM), moderate moisture (MM) and low moisture (LM) treatments at 35℃ were 99.3%, 100%, and 0%, respectively. Drought damage was recorded in plant with the LM treatment. Seedling quality surveys were carried out at 10-days intervals from 10 to 60 days after sowing (DAS). Leaf length and leaf width were increasing until 50 DAS and the number of leaves was increasing until 60 DAS. Root length was increasing until 40 DAS, and then, flowering occurred from 30 to 60 DAS. Lastly, at 40 DAS, leaf aging and root enlargement was observed.
Conclusions: We concluded that the emergence of seedlings was possible in the range of 20 to 40℃. Considering drying and rotting damage, we concluded that the moderate level of moisture is most appropriate for seedling emergence. In addition, we concluded that optimal seedling periods are between 30 and 40 DAS.
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KEYWORD
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Rehmannia glutinosa, Emergence Condition, Seedling Period, Soil Moisture, Temperature
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