An Investigation on the Habitats of Huperzia serrata Populations in Zhejiang and Adjacent Area
浙江及邻近地区蛇足石杉依存环境的初步研究

Natural environment of the growth of Huperzia serrata populations were investigated in Zhejiang and adjacent area. The water content, organic matter content, conductivity and pH in soils, and the content of K?Ca?Mg?Fe?Zn?Cu?Mn?Na?Al?Pb and Cd in soils and plants as well as the content of huperzine A in plants were determined. The results showed that Huperzia serrata mostly grew under closed forests or in ravine with wet soils at altitude 350-1 700 m, with over 1 500 mm annual rainfall, 78% relative humidity, 10%-30% soil water content, 4.57-5.31 soil pH, 0.061-0.385 ms cm-1 soil conductance, and 6.18%-9.75% organic matter. This plant absorbed more K, Ca, Zn and Na than other elements, meanwhile, the accumulation level of Pb, Cu and Cd was high, to which more attention should be paid in cultivation. It is suggested that shady habitats with sufficient rainfall and high relative humidity, and with soils of lower conductance, 4.75-5.31 pH, are good for the cultivation of the plant. The scatter plot produced using Detrended Correspondence Analysis (DCA) based on the soil indices showed that the environmental variables for Pan'an population are distinctly different from those for the other sites, revealing the special environmental conditions having some impacts on the huperzine A content in the plant.