为了确定九华山千层塔〔Huperzia serrata (Thunb.)Trev.〕的最佳采收期和采收部位,根据千层塔不同部位的石杉碱甲含量及各环境因子的变化趋势,运用灰色关联分析法对影响九华山千层塔石杉碱甲含量的主要环境因子进行了分析。结果表明,千层塔各部位的石杉碱甲含量不同,其中根中的含量最低,叶和茎中的含量较高;4月份叶和茎中的石杉碱甲含量最高,分别为0.0559%和0.0444%。影响九华山千层塔石杉碱甲含量的主要环境因子是根际土壤有机质含量、全氮含量和全磷含量,温度和降水量与石杉碱甲含量变化的相关性最小。研究结果表明,在九华山,千层塔的最佳采收期为4月份,最佳采收部位是叶和茎。 

To determine the optimal harvesting time and the best plucking organs, the key environmental factors influencing  huperzine A content of Huperzia serrata (Thunb.) Trev. Were investigated by the grey correlation analysis based on the changes of huperzine A content in different parts of H.   serrata and the environmental factors in Jiuhua Mountain. The results showed that the huperzine A content in different parts was varied, in which the content in root was the lowest, while the contents in leaf and stem were higher. In April, the huperzine A contentin leaf and stem reached the highest with 0.055 9% and 0.044 4%, respectively. The key environmental factors  influencing huperzine A content of H. serratain Jiuhua Mountain were the contents of organic matter,  TN and TP in the rhizosphere soil, and temperature and rain fall showed the least correlation with huperzine A content. It is suggested that the optimal  harvesting time of H. serrata is at April in Jiuhua Mountain, and leaf and stem are the best plucking organs.