[Study on optimal harvest time of semi-wild Glycyrrhiza uralensis at Liangwai, Inner Mongolia].
OBJECTIVE
To study the dynamic accumulation of glycyrrhizic acid (GA) in semi-wild Glycyrrhiza uralensis Fisch. so as to determine its optimal harvest time.


METHODS
The content of GA in the plant samples was determined by HPLC.


RESULTS
In the same growth period, the content of GA in the plant reached its highest peak in June or July, decreased gradually from August, and reached the lowest in November or December. Then the content of GA increased gradually from next March, and finally reached the highest in June or July again. There was no obvious difference between the content of GA in the one-year-old and the two-year-old Glycyrrhiza uralensis. But the content of GA in the three-year-old increased markedly, and its GA content was much higher than that of the one or two-year-old.


CONCLUSIONS
The optimal harvest time of semi-wild Glycyrrhiza uralensis is in July or August after transplanted three years.
The Key Laboratory of Analytical Science of MOE, Xiamen University, Xiamen 361005.
Wang
W
Qiao'e
Wang
W
Wenshen
Zhang
Z
Jishu
Frank
F
Senchun
Wang
W
Xiaoru
D002681:China; D002851:Chromatography, High Pressure Liquid; D029882:Glycyrrhiza uralensis / Q000737:chemistry* / Q000254:growth & development; D019695:Glycyrrhizic Acid / Q000032:analysis*; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D012621:Seasons
D019695:Glycyrrhizic Acid