土壤腐殖质是土壤的重要组分。土壤的许多属性都直接或间接地与腐殖质的性质有关。我们曾指出黑土的腐殖物质及其组分与土壤的物理、化学及生物化学有显著的相关性,这表明它们对氮、磷等营养物质的转化、供应及贮存起着重要的作用。在这方面已有不少研究报告指出这类富含营养物质的有机物的矿化和生物降解产生的低分子有 Soil humus is an important component of soil. Many of the soil’s properties are directly or indirectly related to the nature of the humus. We have pointed out that there is a significant correlation between humus and its components in black soil and the physical, chemical and biochemical properties of soils, suggesting that they play an important role in the conversion, supply and storage of nitrogen, phosphorus and other nutrients. In this regard, many studies have pointed out that the low molecular weight of such mineralized and biodegraded organic compounds