【摘要】 本文对宁镇丘陵十个剖面和里下河圩田二个剖面的腐殖质含量及其组成和络合态铗含量进行了研究。试验结果如下:（1）冲田水稻土耕层腐殖质含量高于旱地黄刚土,低于圩田水稻土,腐殖质积累层厚度随水稻土发育程度而逐渐加深;（2）冲田水稻土腐殖质组成以富里酸占优势,胡敏酸碳/富里酸碳比值高于早地黄刚土,但比圩田水稻土低;（3）冲田水稻土胡敏酸的E₄₆₅低于圩田水稻土;（4）络合态铁含量在全剖面上的分布与腐殖质含量密切相关。更多还原

【Abstract】 The results indicated that, 1) Humus content in the plough horizon of alluvial paddy soil was higher than that in the upland soil "Huang Gang Tu" （derived from the yellowbrown earth）, but lower than that in polder paddy soil, and the humus accumulation horizon gradually thickened with the development of paddy soil. 2) Fulvic acid dominated in the humus constituents of alluvial paddy soil, and the carbon ratio of humic acid to fulvic acid in alluvial paddy soil was higher than that in upland soil, but lower than that in polder paddy soil. 3) The spectral absorption near 465) nm(E₄₆₅) of humic acid in alluvial paddy soil was lower than that in polder paddy soil. 4) The distribution of complex iron in all profiles was closely related to that of humus.更多还原