Characteristics of Heavy Metals in Soil and Vegetations of Liaohe Delta Wetlands

The distribution characteristics of heavy metals in soil and vegetations of Liaohe Delta wetlands were analyzed.The results showed that Cd content had the vertical distribution trend of increasing first and then decreasing with soil depth.The content in 40-60 cm soil depth were maximal.Cr and Zn contents had the trend of decreasing first and the increasing.The heavy metal Pb content were decreasing with the increasing soil depth,and Cu content had no obvious rules.The analysis of heavy metals on spatial distribution showed that the heavy metals in surface soil were increased from the coastal to the island.And the heavy metals of the surface soil near to Shuangtaizi River were also high.The results also showed that the accumulation amount of heavy metals in the Suaeda Heteroptera were higher than those in the reed.And the accumulation amounts of heavy metals were negatively correlated with heavy metals in soil(P0.10).Meanwhile,the accumulated heavy metals in reed leaves were higher than those in the stems.