土壤团聚体形成与稳定机制及影响因素

Forming and Stable Mechanism of Soil Aggregate and Influencing Factors

土壤团聚体是土壤的重要组成部分、土壤结构的基本单位,其形成和稳定主要是通过土壤中各种胶结物质的胶结作用实现的。土壤团聚体的形成和稳定过程是十分复杂的,不仅是自然条件的影响,而且还受到人为活动的严重影响,主要有土壤有机质、土壤微生物、土地利用方式变化和耕作干扰。土壤团聚体还影响土壤养分,尤其是碳氮磷。

Soil aggregate is the main component of soil and the basic unit of soil structure. Its formation and stability are realized by the effects of all kinds of cementing substance in soil. They are controlled by natural condition but influenced severely by human activities, including soil organic matter, soil microorganism, land utilization and tillage disturbance. In addition, soil aggregate affects soil nutrients, especially soil carbon, nitrogen and phosphorus.