深圳福田白骨壤群落Cr、Ni、Mn的累积及分布

Abstract

探讨了深圳福田自然保护区白骨壤红树林对Cr、nI、Mn的吸收、累积及分布.结果表明，该林地土壤Cr、nI、Mn含量从底层至表层逐步提高；表层（0~30CM深）3种元素含量分别为7.97、25.0和537μg·g-1，贮量分别为1099.86、3450.00和74106.00Mg·M-2.白骨壤植物各部位Cr、nI、Mn含量范围分别为0.28~0.75、0.43~7.65和25~1552μg·g-1；植物对表层土壤加权平均富集系数为Mn＞nI≈Cr.该群落Cr、nI、Mn的现存累积量分别为6.06、20.76和1631.17Mg·M-2，年净存留累积量分别为0.43、1.43和107.98Mg·M-2；林地残留物相应元素储量分别为Cr78.00μg·M-2、nI1536.33μg·M-2和Mn405.54Mg·M-2.该林区3种不同类型群落叶层Cr、nI现存累积量为白骨壤林＞桐花树林＞秋茄林，Mn为秋茄林＞白骨壤林＞桐花树林.

The accumulation and distribution of Cr, Ni and Mn in Avicennia marina mangrove community at Futian Mangrove Nature Reserve of Shenzhen are studied.The results show that the Cr, Ni and Mn contents in Forest soil are increased From bottom to surFace layer,and in the surFace layer (depth 0～30 cm) , their contents are 7.79, 25.0 and 537μg· g-1 and storages are 1099.86, 3450.00 and 74106.00 mg.m-2, respectively.Cr, Ni and Mn contents in diFFerent parts of the plant are 0.28～ 0.75,0.43～7.65 and 25～1552μg·g-1, and their storages in the community are 6.06, 20.76 and 1631.17 mg· m-2, respectively.The accumulation index of plant to soil is in the order of Mn> Ni Cr.The annual net retention accumulation of Cr, Ni and Mn in the community is 0.43, 1.43 and 107.98 mg· m-2,respectively.The storage of the elements in residues is 78.00 μg· m-2 For Cr, 1536.33 μg· m- 2 For Ni and 405.54 mg· m-2 For Mn.The Cr, Ni and Mn storages in leaves of various types of communities are in the order of Avicennia marina>Aegiceras corniculatm> Kandelta candel For Cr and Ni, and K.candel> A.marina > A.corniculatum For Mn.