CHANGES IN CONTENT OF TRACE AND ULTRATRACE ELEMENTS WITH AN INCREASE IN NONCRYSTALLINE MATERIALS IN VOLCANIC ASH SOILS OF JAPAN
スポンサーリンク
概要
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A total of 57 elements in volcanic ash soils from 18 pedons distributed in Japan were analyzed and the relationships between noncrystalline material content and that of individual elements were examined. The content of the noncrystalline materials was estimated by using acid-oxalate extraction. Oxalate-extractable Si (Si_o), Fe (Fe_o) and Al (A1_o) corresponds to the Si content in allophane-imogolite, Fe in ferrihydrite and Al in allophane-imogolite plus Al complexed with humus, respectively. Silicon and alkaline or alkaline-earth elements such as Na, K, Ca, and Sr tended to decrease during the process of volcanic ash soil formation, i.e., andosolization. In contrast, the contents of Al, Y, Zr and the first transition metals tended to increase with the increasing content of noncrystalline materials. The first transition metals showed a high correlation with Fe_o suggesting their similarity in chemical behavior during andosolization. The heavy lanthanoid elements tended to increase with the increasing content of allophane-imogolite.
- 日本粘土学会の論文
著者
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Honna Toshimasa
Faculty of Agriculture, Tottori University
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Honna Toshimasa
Faculty Of Agriculture Tottori University
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MANZYO MASAMI
Graduate School of Agricultural Science, Tohoku University
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YAMASAKI SHIN-ICHI
Hazaka Plant Research Center,
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Yamasaki Shin-ichi
Hazaka Plant Research Center
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Manzyo Masami
Graduate School Of Agricultural Science Tohoku University
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