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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E_(465)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。
In this paper, the humus content and its composition and complexation content in two sections of Ningxia hilly ten profiles and Lixiahe polder were studied. The results are as follows: (1) The content of humus in paddy soil of paddy field was higher than that in yellow paddy soil of dry land, and lower than that of polder paddy soil. The thickness of humus accumulation layer deepened with the development of paddy soil. (2) (3) The E_ (465) of humic acid in paddy soil was lower than that in polder paddy soil; (4) The ratio of carbon to fulvic acid in humic acid was higher than that in early Huanghuang soil, but lower than that in paddy soil. The distribution of state iron in the whole section is closely related to the humus content.