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[Qualities of Whitmania pigra in different-month-age and best harvest time]
Hongzhuan Shi1, Qiaosheng Guo, Shusong Lu
1Institute of Chinese medicinal materials, Nanjing Agricultural University, Nanjing 210095, China.
Objective:
Dynamic changes of quality and growth of Whitmania pigra were investigated to provide theoretical basis for quality control and determination of optimal harvest time.
Method:
The contents of moisture, ethanol-soluble extractive, total ash, and acid-insoluble ash, as well as antithrombin activity were determined according to Chinese pharmacopoeia (2005 edition).
Result:
Qualities of W. pigra collected from different growth stages met the standards of Chinese pharmacopoeia (2005 edition). The highest amount of ethanol-soluble extract was found in 9-month-old, W. pigra, followed by 6-month-aged ones. And there was significant difference between 9-month-old and 4-month-old, 7 month-old and 11 month-old (P < 0.05). The highest antithrombin activity was detected in 6 month-old W. pigra, followed by 10 month-old. Significant differences of antithrombin activity were found between 6-month-old and 4 month-old ones, and 5 month-old (P < 0.05), however, there were no significant difference between 6 month-old ones with other samples. Eleven-month-old W. pigra got the most dry weight, and there were significant difference between 11 month-old ones with other samples (P < 0.05).
Conclusion:
November, namely for 6 month old artificial cultivated W. pigra was the best harvest time in Jiangsu and Zhejiang provinces.
