非腐解有机物培肥对苏打草甸水稻土腐殖质结合形态的影响

几种非腐解有机物为施于苏打草甸水稻土后，对土壤中不同结合形态的腐殖质的动态变化进行了研究。结果表明，非腐解有机物料施入供试水田土壤后，土壤中的公结态腐殖质和联结态腐殖质均较对照大幅度增加，而穗结态和紧结是显著差异，从所测得的胡敏酸和富里酸含量的动态变化看，土壤松结态和联结态腐殖质的胡敏酸，富里酸的含量也都有所提高，但松结态腐殖质中以胡敏酸增加的度明显，而联结态腐殖质中以富里酸增加的幅度明显。

Effects of Undecomposed Organic Materials on the Combined States of Soil Humic Substance in Sodic Meadow Paddy Soil

The combined states of soil humic substances were studied after undecomposed organic materials were applied into sodic meadow paddy soil. It was found that compared with control treatment, the loosly combined humic substances and unitedly combined humic substances were increased and the stably combined humic substances and tightly combined humic substances had no significant changes; the humic acids and fulvic acids were increased in the loosly combined humic substances and unitedly combined humic substances, however, the humic acids were increased significantly in the loosly combined humic substances and the fulvic acids were increased in the unitedly combined humic substances.