植物根系对土壤团聚体形成作用机制研究回顾

土壤团聚体是土壤结构的基本单元,土壤水力侵蚀的微观描述即为土壤团聚体的破裂过程。研究表明:植物根系可以改变土壤的力学以及水文特征,促进土壤团聚体的形成和稳定。因此,对近20年国内外的相关研究成果进行较为系统的回顾,从根系对土壤团聚体的物理、生物、电化学作用3个研究视角,分析了植物根系对土壤团聚体形成的作用机制,提出了现有研究中存在的问题及研究趋势,这对深入认识植物根系对土壤团聚体的影响及其作用机制、发展根-土相互作用的土壤侵蚀过程模型具有重要的意义。

Review of the Mechanism of Root System on the Formation of Soil Aggregates

Soil aggregate is the basic unit of soil structure and the microscopic description of soil hydraulic erosion is the fracture process of soil aggregate. According to the research data, plant roots have the ability to change the mechanical and hydrological characteristics of soil and promote the formation and stability of soil aggregates. Therefore, this paper makes a systematic review of the relevant research results at domestic and abroad in the past 20 years, analyzed the mechanism of plant roots on the formation of soil aggregates, and put forward the existing problems and research trends from the perspectives of the physical, biological and electrochemical studies on soil aggregates by roots. It is of great significance to deeply understand the effect of plant roots on formation and stability of soil aggregates, and to develop the soil erosion process model of root-soil interaction.