Heavy metals (copper,lead, nickel,and cadmium) in the organic part of gray forest soils in the Buryat Republic |
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Authors: | G D Chimitdorzhieva A Z Nimbueva E A Bodeeva |
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Institution: | 1.Institute of General and Experimental Biology, Siberian Branch,Russian Academy of Sciences,Ulan-Ude, Buryat Republic,Russia;2.Buryat Republican Pedagogical College,Ulan-Ude, Buryat Republic,Russia |
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Abstract: | The levels of the accumulation of copper, lead, nickel, and cadmium in the parent material-soil-plants-soil organic matter
system are given for gray forest soils in the Buryat Republic. The concentrations of copper, lead, and nickel in the parent
materials do not exceed the corresponding clarkes, and cadmium is present in trace amounts. The concentrations of copper and
nickel in the humus horizon are lower than those in the parent material; an opposite situation is observed for lead. The concentrations
of copper, lead, and nickel in the soil organic matter and in the herbaceous plants correspond to their contents in the soil
and do not exceed the background (clarke) values. Cadmium was not detected in the aboveground part of the plants, though it
was found in the root mass and in the organic soil horizon. In the humus of gray forest soils, these heavy metals are mainly
present in the acid filtrate remaining after the precipitation of humic acids. |
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