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cje ›› 2005, Vol. ›› Issue (2): 113-117.

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Precipitation chemistry in the multiple canopies of Shaoshan forest in Hunan Province

JIANG Yimin1, ZENG Guangming1, ZHANG Gong1, LIU Hongliang2   

  1. 1. Department of Environmental Science and Engineering, Hunan University, Changsha 410082, China;
    2. Institute of Environmental Science Research, Beijing 100012, China
  • Received:2003-05-19 Revised:2003-06-26 Online:2005-02-10

Abstract: A total ten 30 m?30 m researching plots in Shaoshan forest was used for this study.The net-precipitation and the total deposition of the ions in the multiple canopies in the one whole year were recorded.The net-precipitation of Ca2+ from canopy leaching and the containing Ca2+ substances in the atmosphere were positive in canopy and sub-canopy.Except the vegetation developing and growing season,the obvious leaching of Mg2+ from the canopies was observed.Significant differences of K++ was observed between the heavy leaching from the canopy and the absorption by the sub-canopy.The leaching of SO42-,NO3-,Cl- also existed in the two layer of canopies.The transportation of seawater was the other important Cl- source.The results of total deposition showed that the amount of Ca2+ in spring and summer reached the higheast in the observed year.For Mg2+,it was the highest in autumn and winter,and for K+,it was the highest in autumn.

Key words: Laminaria japonica, Strain, Antioxidant system, Heat-resistance, Relationship

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