Effects on the Storability Enhancement and Root Yield by Air Curing of the Seed Rhizome of Rehmannia glutinosa Liboschitz ex Steudel
2018
Lee, S.H., NIHHS, RDA, Eumseong, Republic of Korea | Yun, H.M., Korean National College of Agriculture and Fisheries, Jeonju, Republic of Korea | Koo, S.C., NIHHS, RDA, Eumseong, Republic of Korea | Hur, M., NIHHS, RDA, Eumseong, Republic of Korea | Han, J.W., NIHHS, RDA, Eumseong, Republic of Korea | Lee, W.M., NIHHS, RDA, Eumseong, Republic of Korea | Chang, J.K., NIHHS, RDA, Eumseong, Republic of Korea | Kim, Y.B., Korean National College of Agriculture and Fisheries, Jeonju, Republic of Korea
Background: The use of Rehmannia glutinosa of the family Scrophulariaceae, in traditional medicine is well known. This study was conducted to elucidate the effect of air curing of the seed rhizome of R. glutinosa on its storability and yield. Methods and Results: The root of the R. glutinosa cultivar (Dagang) was harvested in at the end of November. The seed rhizomes were air cured for one to seven days. They were subsequently wrapped with newspaper and further stored in a plastic container at 1°C. It was observed that the weight loss and decay rates were significantly lower in the air cured seeds than in the untreated ones. Moreover, the decay rate of the control was approximately 50%, 120 days after storage. However. the decay rate of all the air cured treatment groups was less than 1%. Additionally, air curing led to an increase in the germination rate of the seeds and the root yield when compared with the untreated groups. Taken together, the ideal treatment period for air curing was found to be 3 days. Under these conditions, the germination rate and yield were 88.7% and 2,185 ㎏/10a, respectively. Conclusions: This study successfully demonstrated that the air curing of seed rhizomes can lead to a considerable increase in the storability and yield of R. glutinosa.
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