通过研究滨海水稻土腐殖质各成分的组成及性质,结果表明各组分有机碳及氮含量均为表层最高,C/N在结构相对稳定的结合态腐殖质和胡敏酸(HA)中波动较小,而在游离态腐殖质和富里酸(FA)中变化较大。随着种稻时间变长,结合态的腐殖质和胡敏酸有在土壤中积累的趋势,在1000a水稻土中腐殖质的芳香化程度最高、结构最复杂。
A study was carried out to explore composition and characters of humus in coastal paddy soil. Results show that the surface soil layer was the highest in organic carbon and N content regardless of humus fractions. In tightly bonded humus relatively stable in structure and humus acids, C/N ratio fluctuated less, while in loosely bonded humus and fulvic acids, it did in a wider range. The formers showed an accumulating trend in soils with the age of paddy planting, and the highest degree of aromatization and the most complicated structure in 1000-year old paddy soil.