关键词: 生物固化, 细菌, 酶, 沙漠, 风力侵蚀

Abstract: This paper reviews recent research studies on biological soil cementation methods, or bio-cementation, for sand stabilization and wind erosion control. The biological processes adopted for bio-cementation involve microbially- or enzymeinduce carbonate precipitation (MICP or EICP), and the auxiliary use of biopolymers such as xanthan gum can achieve better soil stabilization effects. In the process of soil wind erosion, in addition to the wind itself, the bombardment of the saltating particles carried by the wind is also a key factor of erosion damage. This has been evidenced in the wind erosion tests of bio-cemented soils. The treatment process of soil bio-cementation for wind erosion control is simple and easy. Using urea and calcium salt as treatment materials, and bacteria or urease as catalytic agents, a single-pass spraying treatment on the soil can obtain a good wind resistance effect. In the laboratory wind resistance tests, the combination of wind erosion rate and threshold detachment velocity is a more reasonable evaluation method for wind erosion. In laboratory and field conditions, the surface penetration test can be a simple and quick method to determine the treatment effect and wind erosion resistance. Current field studies indicate that plants can grow in soil with bio-cemented crust, but their growth is restricted under some adverse conditions. Further studies may concentrate on erosion resistance capability under multiple erosion factors, ecological restoration ability in bio-cemented soil, and construction technologies related to the use of bio-cementation, etc.