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不同施肥途径对土壤有机质的影响各异,有机质总量比培肥前5年累积增长为:有机肥>秸秆还田>草木樨还田>化肥,对照区有所下降。重组有机质、复合有机质及复合体中不同结合态腐殖质也发生明显变化。有机物料培肥土壤是提高土壤肥力的重要途径。
Different fertilizers have different effects on soil organic matter. The total amount of organic matter in the first 5 years of cumulative fertilization increased as follows: organic fertilizer> straw returning> returning fertilizer> returning fertilizer, control area decreased. Different combinations of humic substances in recombinant organic matter, organic compounds and complexes also changed obviously. Fertilizing soil with organic materials is an important way to improve soil fertility.