Distribution of Zinc, Manganese, Copper, Cobalt, and Nickel in Andosols Profiles
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概要
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The distribution of zinc, manganese, copper, cobalt, and nickel in Andosols was investigated. Sixty nine soil samples were collected from different horizons of an Andosols profile in Miyakonojo Basin in south Kyushu, Japan. The total contents of heavy metals were determined by digestion and four extraction solutions, I M NH_4Ac (ammonium acetate) pH 4.5, 0.1 M HCl, 0.01 M EDTA (ethylenediaminetetraacetic acid) pH 6.5, and 0.005 M DTPA (diethylenetriaminepentaacetic acid) pH 7.3 were used to determine the contents of available Zn, Mn, Cu, Co, and Ni in Andosols in relation to the organic carbon content. The results of the extraction analysis showed that by the use of 0.1 M HCl high value of extracted heavy metals in the upper layers of the humus horizons were obtained while EDTA extraction yielded a large amount of the above mentioned metals in the high humus horizons. The extractable heavy metals contents were high and these metals closely related to the organic carbon content mostly in the humus horizons in the profile. Where, biocycling process may play an important role in the concentration of heavy metals. Based on the study, it was found that the total content of Zn increased towards the C horizons or pumice layers in the soil profile. Such a trend was also found in the case of the Mn content. While the Cu content in the humus horizons was much higher in the upper part of each humus horizon. According to this study the distribution of heavy metals, Cu (organic matter complexes) in the Andosols profile was more stable than that of Zn (organic matter complexes) in soils. It was shown that Zn in the surface humus horizon was enriched but that some amount was leached under buried conditions. The same phenomenon was also observed in the distribution of Mn in the profile. The movement of Co and Ni in the soil profile was limited, as evidenced by the sharp reduction in the concentrations of these two metals in buried soils. Hence, it is concluded that the distribution of Zn, Mn, Cu, Co, and Ni was considerably higher in the humus horizons of the Andosols profiles.
- 社団法人日本土壌肥料学会の論文
著者
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Takaki H
Department Of Agriculture And Forest Science Faculty Of Agriculture Miyazaki University
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Takaki Hiroshi
Laboratory Of Soils And Plant Nutrition Faculty Of Agriculture Miyazaki University
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Rahman Shahedur
Laboratory of Soils and Plant Nutrition, Faculty of Agriculture, Miyazaki University
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Nagatomo Yoshitaka
Laboratory of Soils and Plant Nutrition, Faculty of Agriculture, Miyazaki University
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Tamai Makoto
Laboratory of Soils and Plant Nutrition, Faculty of Agriculture, Miyazaki University
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Takeda Misako
Department Of Ophthalmology Juntendo University School Of Medicine
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Tamai Makoto
Department Of Ophthalmology And Visual Science Tohoku University Graduate School Of Medicine
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Nagatomo Y
Department Of Biochemistry And Applied Biosciences Faculty Of Agriculture University Of Miyazaki
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Takaki Hiroshi
Laboratory Of Soil Science And Plant Nutrition Faculty Of Agriculture Miyazaki University
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Rahman Shahedur
Laboratory Of Soils And Plant Nutrition Faculty Of Agriculture Miyazaki University
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Nagatomo Yoshitaka
Laboratory Of Soils And Plant Nutrition Faculty Of Agriculture Miyazaki University
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Tamai Makoto
Laboratory Of Soils And Plant Nutrition Faculty Of Agriculture Miyazaki University
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Tamai Makoto
Graduate School Of Medicine Tohoku University
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