Aluminum Dynamics in Nonallophanic Andosols from Northeastern Japan
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概要
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We studied Al dynamics in nonallophanic Andosols from northeastern Japan by determination of Al solubility and Al release rates, selective dissolution analyses of active Al fractions, and examination of liming effect on the active Al. Aluminum solubility of the nonallophanic Andosols was lower than that of gibbsite in the lower pH range and showed oversaturation in the higher pH range, indicating that the Al solubility was controlled by Al-humus complexes. There was a close relationship between Al saturation (KCl-extractable Al/effective CEC) and the amount of pyrophosphate extractable Al, indicating that exchangeable Al is equilibrated with organically complexed Al. Liming (CaCO_3 treatment) largely reduced the amount of organically complexed Al (pyrophosphate- and CuCl_2-extractable Al), confirming that a portion of Al-humus complexes are labile.aluminum-humus complexesaluminum release ratealuminum solubilityaluminum toxicityexchangeable aluminumliming
- 東北大学の論文
著者
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NANZYO Masami
Graduate School of Agricultural Science, Tohoku University
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Takahashi Tadashi
Graduate School of Agricultural Science, Tohoku University
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Nanzyo Masami
Graduate School Of Agricultural Science Tohoku University
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Takahashi Tadashi
Graduate School Of Agricultural Science Tohoku University
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