| Study on Humic Acids of the Soil Applied with Corn Stalk by Spectroscopy Measurements |
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| 作者姓名： | WU Jing-gui WANG Ming-hui JIANG Yi-mei XU Yan |
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| 作者单位： | College of Resource and Environment Sciences, Jilin Agricultural University, Changchun 130118, P.R.China |
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| 基金项目： | 国家自然科学基金，Jilin Province Office of Science and Technology，吉林省杰出青年科学基金 |
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| 摘 要： | Spectroscopy measurements （Fourier transform infrared differential spectroscopy, Carbon-13 nuclear magnetic resonance spectrometry, Matrix-assisted laser resorption/ionization-time of flight mass spectrometry） were performed to study the humic acids of the soil applied with corn stalk. The results showed that after incorporation of corn stalks into the soil, the soil humic acid （HA） changed significantly in different stages. During first 60 days, new HAs were formed by polymerization and seems to be similar to that of initial HAs from composting corn stalk, some little molecular organic matters also reacted with soil HAs and turned into parts of soil HAs. After 60 days of the corn stalk residue incorporation, new HAs were formed by polymerization of decomposed lignin molecules, some methylenes transformed into methyls and methoxyls since the 90th day. Application of corn stalk led to the increase of aliphatic components in soil HAs, the decrease in aromatic components of soil HAs and the suppression in oxidation degree of soil HAs. The average molecular weight of soil HAs also declined because of application of corn stalk.
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| 关 键 词： | 玉米 土壤 腐殖酸 光谱分析 CPR |
Study on Humic Acids of the Soil Applied with Corn Stalk by Spectroscopy Measurements |
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| WU Jing-gui WANG Ming-hui JIANG Yi-mei XU Yan.Study on Humic Acids of the Soil Applied with Corn Stalk by Spectroscopy Measurements[J].Agricultural Sciences in China,2005,4(9):685-692. |
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| Authors: | WU Jing-gui WANG Ming-hui JIANG Yi-mei XU Yan |
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| Abstract: | Spectroscopy measurements (Fourier transform infrared differential spectroscopy, Carbon-13 nuclear magnetic resonance spectrometry, Matrix-assisted laser desorption/ionization-time of flight mass spectrometry) were performed to study the humic acids of the soil applied with corn stalk. The results showed that after incorporation of corn stalks into the soil, the soil humic acid (HA) changed significantly in different stages. During first 60 days, new HAs were formed by polymerization and seems to be similar to that of initial HAs from composting corn stalk, some little molecular organic matters also reacted with soil HAs and turned into parts of soil HAs. After 60 days of the corn stalk residue incorporation, new HAs were formed by polymerization of decomposed lignin molecules, some methylenes transformed into methyls and methoxyls since the 90th day. Application of corn stalk led to the increase of aliphatic components in soil HAs, the decrease in aromatic components of soil HAs and the suppression in oxidation degree of soil HAs. The average molecular weight of soil HAs also declined because of application of corn stalk. |
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| Keywords: | Corn stalk Soil humic acid Spectroscopy measurement |
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