【摘要】 本文通过化学分析和仪器分析，研究了土壤中钙键复合体和铁铝键复合体中腐殖质的化学组成、分子结构和理化性状。结果表明，铁铝键复合体中腐殖质（包括胡敏酸和富啡酸）的C、H、N含量高于钙键复合体中腐殖质，C／H、C／N比则低于后者，铁铝锭复合体腐殖质的分子结构中胡敏酸的芳化度高于后者，而富啡酸的芳化度则低于钙键复合体。并且，铁铝键复合体中腐殖质的热稳定性和对金属离子的螯合亲和力皆高于钙键复合体。更多还原

【Abstract】 Elemental composition, molecular structure, and physical and chemical properties of Ca bound and Fe / Al-bound humus in soil were determined by chemical and instrumental analyses. Results showed that the contents of C, H and N were higher in Fe / Al-bound humus than in Ca-bound humus, while the ratios of C/ H and C/ N were higher in Ca-bound humus. The aromaticity of humic acid in Fe / Al-bound complex was higher than in Ca-bound complex, but that of fulvic acid was higher in Ca-boundcomplex. Fe / Al-bound humus had the higher thermal stability and the stronger affinity for coordinating metal ions than Ca-bound humus.更多还原