Fractionation of Soil Fulvic Acids Using Polyvinyl-pyrrolidone and Their lonization Difference Spectra
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概要
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Fulvic acids were divided into adsorbed brown fractions and non-adsorbed pale-yellow fractions using insoluble polyvinypyrrolidone (PVP) as an absorbent. The distribution pattern of the two fractions varied with the types of soils. The yield of the PVP-adsorbed fraction was higher in the order of brown forest soils, ando soils, and lowland paddy soils and red-yellow soils. The difference spectra between pH 12 and pH 7 (ΔE_<7-12> spectra) and those between pH 7 and pH 3 (ΔE_<3-7> spectra) of the PVP-adsorbed fractions were classified into three types corresponding to the types of soils. The ΔE_<7-12> spectra of the PVP-adsorbed fractions and humic acids obtained from the same soil were similar. In the PVP-non-adsorbed fractions, both the ΔE_<7-12> and ΔE_<3-7> spectra did not clearly differ among all soils.
- 社団法人日本土壌肥料学会の論文
著者
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Watanabe Akira
Laboratory of Soil Biology and Chemistry, Graduate School of Bioagricultural Sciences, Nagoya Univer
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Kuwatsuka Shozo
Laboratory Of Soil Science Faculty Of Agriculture Nagoya University
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Watanabe Akira
Laboratory Of Radiation Biology Faculty Of Science University Of Tokyo:(present) Research Institute
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Watanabe Akira
Laboratory Of Bioindustrial Genomics Graduate School Of Agricultural Science Tohoku University
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