| Taking the developed extensively latosol of Hainan island as research area, and using on-site sampling and laboratory analysis (ICP-MS ) testing methods, the content and the distribution characteristics of Mn,Zn,Cu and Ni in latosol were studied. Total concentrations and bioavailability of Mn, Zn, Cu and Ni were measured for 63 soil samples from Hainan Island, and the total concentrations were also measured of 9 plant samples segmented into stem, leaf and root. The results are described as follows:1. Mn, Zn, Cu, Ni content and distribution in Hainan Island Latosol(1)The elements of the level of the whole amount of the order of: Mn(271.54μg/g)>Zn(52.65μg/g)>Cu(31.78μg/g)>Ni(15.81μg/g). In addition to Mn content is lower than the average background values outside the latosol of Hainan, Zn, Cu, Ni concentrations are higher than the average background value of Hainan latosol.(2)Mn, Zn, Cu, Ni content in the different landforms of the Variation of latosol as followed: the central mountain> hilly> platform plain. The description of Mn, Zn, Cu, Ni differentiation were significantly affected by three landforms of Hainan Island.(3)Mn, Zn, Cu, Ni in laterite profiles A, B, C layer in the differentiation of soil parent material were significantly affected by the different soil parent materials, elements in A, B, C layer is not the same degree of differentiation.(4)The differentiation of Mn, Zn in the red granite tiles, sandstone and shale brick latosol red and carved shallow sediments are vary significantly, in the basalt and shale brick latosol red carve differences is not obvious. Cu in the five different carved laterite parent material differences are not obvious. Ni laterite in granite, basalt, latosol, sandstone and shale brick latosol red and shallow sediments vary significantly carve, carved in red sandstone and mudstone slabs obvious differences.2. Mn, Zn, Cu, Ni content and distribution of soluble in Hainan Island Latosol(1)Concentration levels of the four elements of the sorting of soluble: Mn(23.564μg/g)>Zn(1.2281μg/g)>Cu(0.4473μg/g)>Ni(0.2055μg/g).(2)Mn, Zn, Cu, Ni soluble latosols in different landforms latosol in the variation as followed: Mn and Cu : the central mountain> mesa plain> hilly; Zn: platform Plain> hilly> central mountains; Ni: Central Mountains> hilly> platform plain.(3)Mn, Zn, Cu, Ni in laterite profiles of soluble A, B, C layer in the differentiation of soil parent material were significantly affected by the different soil parent materials, elements in A, B, C layer is not the same degree of differentiation.(4)The differentiation of soluble Ni is largest element, Cu differentiation minimum; Basalt Latosol Mn, Zn, Cu, Ni in the different degree of basalt carved latosol is not obvious; Red sandstone and shale brick elements in soluble Mn Differentiation state of the largest, Zn smallest element differentiation; Latosol sandstone and mudstone in the differentiation of soluble Mn elements in the largest, Zn smallest element differentiation; Shallow laterite deposits in the Mn, Zn, Cu, Ni was soluble differentiation .3. Mn, Zn, Cu, Ni distribution of content in the plantIn Hainan Island, Mn, Zn, Cu, Ni laterite deposits in shallow water on the Casuarina in the roots, branches, leaves accumulation: Mn, Zn, Cu, Ni is mainly distributed and accumulated in the leaves and roots, but branches are few.4. Heavy metal pollution evaluation in Hainan Island LatosolIn Hainan Island Latosol, surface soil (A layer) of the single-factor pollution index of evaluation results show that environmental quality in Hainan Latosol generally are good, except for some degree of individual regions or more of heavy metal pollution exceeded the standard, and the degree of soil pollution mainly is mild, moderate pollution of the samples distributed in Qiongzhong basalt. This shows that soil parent material is the most important factor in latosol environmental quality. It is not obvious that latosol environment has been affected by human activities and agricultural production.
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