红树林北缘秋茄天然林群落Pb的累积及分布

Distribution and Accumulation of Pb Element in the Natural Kandelia candel Communities in North Mangrove Forests

摘要: 对福鼎天然秋茄红树林群落中Pb的分布特征进行研究，探讨林区重金属Pb的吸收、累积与分布。结果表明：该林地秋茄植株各部分Pb含量范围为745～11331mg/kg，对表层土壤平均富集系数为0284；秋茄林地表层土壤（0～30cm深）Pb元素含量为9988mg/kg，超过国家海洋沉积物第一类质量标准，其储量（0～30cm）为1407065mg/m2，该群落Pb元素的现存累积量为40048mg/m2。

Abstract: The distribution characteristics of Pb in the natural Kandelia candel communities of Fuding were investigated to study the absorption, distribution and accumulation of Pb element in the mangrove forests. The results showed that the Pb element contents in different organs of the Kandelia candel plants ranged from 745～11331 mg/kg, and the average Pb enrichment coefficient in the top soil was 0284. The pool amount of Pb in the top forest soil（0～30cm depth）was 9988 mg/kg, which preponderated over the 1st quality category for oceanic sedimentation set by the National Sea Environmental Quality Standard. The Pb element storage in the mangrove forest top soil（0～30cm）was 1407065mg/m2 and the current accumulation of Pb element in the mangrove communities was 40048mg/m2．