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• 基金项目：国家自然科学基金(39370147号)

• 郑文教

• 郑逢中

• 连玉武

• 林鹏

• 摘要：探讨了福建九龙江口秋茄红树林对重金属元素Cd、Cr、Ni的累积及动态。结果表明:该林区表层土壤(0-30cm深)Cd、Cr、Ni元素的储量分别为21.60、1092.63和3903.90mg/m²,秋茄植物体各部位Cd、Cr、Ni含量的范围分别为0.0444-0.092、0.085-0.275和0.326-1.000ug/g.该群落现存生物量中,Cd、Cr、Ni元素的储量分别为1166.85、3646.48和10506.91ug/m².林地残留物相应元素的储量分别为13.83、35.07和232.61ug/m².群落Cd、Cr、Ni的生物循环为:年吸收量分别为179.60、703.15和1611.72ug/m²;年存留量分别为107.70、322.93和917.13ug/m²,年归还量分别为71.90、380.22和694.59ug/m²,周转期分别为16、10和15年。

• Abstract：The accumulation and dynamic of Cd, Cr and Ni were studied in Kandela candel(L.)Druce mangrove community in Jiulong River Estruary of Fujian. The results showed that: the amounts of Cd, Cr, and Ni in the forest soil(depth 0-30 cm) were 21. 60, 1092. 63 and 3902. 90 (mg/m²). In different parts of the plant, the contents of the elements were Cd 0. 0444-0. 0921, Cr 0. 085-0. 275 and Ni 0. 326 1. 00 (μg/g). The pool amounts of the elements in standing crop of the community were 1166. 85 μg/m² for Cd, 3646. 48 μg/m² for Cr and 10506. 91 μg/m² for Ni. The pool amounts of the elements in the residues were Cd 13.83, Cr 35. 07 and Ni 232.61 (μg/m²). The biological cycles of the elements in the community were: annual uptake Cd 179. 60, Cr 703. 15 and Ni 1611. 72 (μg/m²); annual retention Cd 107. 70, Cr 322. 93 and Ni 917. 13 (μg/m²); annual retrun Cd 71. 90, Cr 380. 22 and Ni 694. 59 (μg/m²); turnover period Cd 16, Cr 10 and Ni 15(year).

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