| 土壤中钙结合和铁铝结合腐殖质的组成及结构特征 |
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| 作者姓名： | S. U. CHEEMA XU Jian-Min YUAN Ke-Neng |
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| 作者单位： | Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china);Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china);Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china) |
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| 基金项目： | *1Project supported by the National Natural Science Foundation of China and the Laboratory of Material Cycling in Pedoaphere, Academia Sinica. |
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| 摘 要： | Calcium-bound and iron- and aluminium-bound humus extracted from different soils collected from north to south of China were characterized by chemical and spectroscopic methods. Meaningful differences in the composition and structure between them were revealed by 13C NMR, visible spectroscopy and elemental analysis. Results showed that the contents of carbon, hydrogen and nitrogen were higher in iron- and aluminium-bound humus than in calcium-bound humus while oxygen content in calcium-bound humus was shown to be higher. The calcium-bound humus had higher C/N and O/C ratios than iron- and aluminium-bound humus. The calcium-bound humic acid (HA1) showed higher E4/E6 ratios than iron- and aluminum-bound humic acid (HA2) while iron- and aluminum-bound fulvic acid (FA2) showed higher E4/E6 ratios than calcium-bound fulvic acid (FA1). An inverse relationship between E4/E6 ratios and aromaticity as determined by 13C NMR spectra was observed for HA and FA from black soil. The 13C NMR spectroscopy revealed that HA2 was more aromatic than HA1. On the other hand, FA1 exhibited a higher aromaticity than FA2.
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| 关 键 词： | humus organo-mineral complexes soils |
Composition and structural features of calcium-bound and iron-and aluminium-bound humus in soils |
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| S. U. CHEEMA,XU Jian-Min,YUAN Ke-Neng.Composition and structural features of calcium-bound and iron-and aluminium-bound humus in soils[J].Pedosphere,1996,6(3):277-284. |
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| Authors: | S U CHEEMA XU Jian-Min and YUAN Ke-Neng |
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| Institution: | Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china);Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china);Department of Soil Science and Agricultural Chendstry, Zhejiang Agricultural University, Hangzhou 31O029 (china) |
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| Abstract: | Calcium-bound and iron- and aluminium-bound humus extracted from different soils collected from north to south of China were characterized by chemical and spectroscopic methods. Meaningful differences in the composition and structure between them were revealed by 13C NMR, visible spectroscopy and elemental analysis. Results showed that the contents of carbon, hydrogen and nitrogen were higher in iron- and aluminium-bound humus than in calcium-bound humus while oxygen content in calcium-bound humus was shown to be higher. The calcium-bound humus had higher C/N and O/C ratios than iron- and aluminium-bound humus. The calcium-bound humic acid (HA1) showed higher E4/E6 ratios than iron- and aluminum-bound humic acid (HA2) while iron- and aluminum-bound fulvic acid (FA2) showed higher E4/E6 ratios than calcium-bound fulvic acid (FA1). An inverse relationship between E4/E6 ratios and aromaticity as determined by 13C NMR spectra was observed for HA and FA from black soil. The 13C NMR spectroscopy revealed that HA2 was more aromatic than HA1. On the other hand, FA1 exhibited a higher aromaticity than FA2. |
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| Keywords: | humus organo-mineral complexes soils |
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