Background Levels of Trace and Ultra-Trace Elements in Soils of Japan
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概要
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Five hundred and fourteen soil samples collected from 78 sites in Japan were analyzed for their contents of trace and ultra-trace elements. We estimated the background levels (natural abundance) of 57 elements in soils. The concentration ranges were so wide that the ratios of the highest values to the lowest values were more than 100 for all the elements, with the exception of Be, Ga, Mo, Ag, In, Sn, and Ba. While the concentrations of the first transition elements (_<21>Sc to_<30>Zn in atomic numbers) were higher than the concentration of the other elements, those of lighter (_3Li and _4Be) and heavier elements tended to decrease, with an increase or decrease of atomic numbers, with the apparent exception of Pb, Th, and U. Concentrations of elements with even atomic numbers were, in most of the cases, higher than the concentrations of both adjacent elements with odd atomic numbers. Frequency distribution of most of the elements was strongly positively skewed. Markedly positive correlation coefficients (γ>0.9) were observed among the elements within the same group in the Periodic Table in many combinations. The dendrogram obtained by cluster analysis showed that the occurrence and distribution of the elements in soils were mostly controlled by the chemical properties of each element, rather than by the nature and properties of individual soil samples. The total contents of the elements in soils were strongly dependent on the chemical composition of the parent rocks from which respective soils were derived.
- 社団法人日本土壌肥料学会の論文
著者
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TAKEDA Akira
Institute for Environmental Sciences
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Taniyama Ichiro
National Institute For Agro-environmental Sciences
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Taniyama Ichiro
Laboratory Of Soil Science Graduate School Of Agriculture Tohoku University
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Nakai M
National Institute For Agro-environmental Sciences
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Nakai Makoto
National Institute For Agro-environmental Sciences
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Yamasaki Shin-ichi
(Present address)
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Takeda Akira
o Kennan Eisei Kogyo Co., Ltd.
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Nanzyo Masami
Institute for Environmental Sciences
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Nanzyo Masami
Laboratory Of Soil Science Graduate School Of Agriculture Tohoku University
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Yamasaki Shin-ichi
(present Address):hazaka Plant Research Center.c/o Kennan Eisei Kogyo Co. Ltd.
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