###### Abstract
With the rapid development of industrial society, lots of disturbed slopes with seriously damaged substrates have been formed, and they are easily degraded or even collapsed under gravity and rainfall [17]. Therefore, it is necessary to enhance the erosion resistance of the slope matrix and reduce soil loss. Adding chemical stabilizers, such as fly ash, cement, or polyacrylamide (PAM), to gypsum material can be used to improve soil properties [18; 19]. However, the traditional curing methods will lead to different degrees of impact on the environment. The use of cement or lime requires a lot of energy consumption and discharges harmful gases [20; 21]. Most of the chemical grouting materials, such as polyurethane and epoxy, are toxic and harmful to human health [22]. Microbial mineralization exists widely in nature. Compared with the traditional curing method, it has the advantages of having a controllable reaction, low energy consumption, and being environmentally friendly [23]. The usage of phosphogypsum is limited, and it is only used as an additive; therefore, its utilization rate still needs to be improved. Microbial-induced carbonate precipitation (MICP) is a new method of material modification that has developed in recent years, and it can change the particle connection mode and pore structure characteristics of the material. The existing modification method of using an organic polymer chemical solution has the disadvantages of creating a toxic chemical solution and polluting groundwater environment. MICP uses the urease secreted by carbonate-mineralization microbes to decompose urea and generate carbonate ions, which combine with metal cations in the background, such as calcium ions and magnesium ions, to produce carbonate precipitation [24; 25; 26]. The precipitation can bond loose particles together to improve strength performance [27; 28; 29; 30], and block pores in porous media to reduce the seepage in pores [31; 32; 33]. The phenomenon of microbial-induced carbonate precipitation is widespread in the natural environment, and there are many carbonate mineralization microbes distributed in the soil or seawater [34]. On the basis of this phenomenon, MICP is an environmentally friendly method. _Bacillus pasteurii_ with high urease yield is commonly used in MICP [35]. Many scholars use this strain to modify concrete or other loose materials, such as sand and soil, which can effectively reduce the water absorption and moisture permeability of porous medium and improve the strength and erosion resistance of materials [36; 37]. The precipitation can be used as a filling material to repair cracks [38; 39]. As early as 1992, [PERSON] et al. used calcium carbonate induced by MICP to seal the pores between sand particles, which reduced the porosity of the sand column by 50% and the permeability coefficient by nearly 90% [40]. Previous studies have shown that MICP can significantly enhance the mechanical properties of various materials [41; 42]. [PERSON] et al. extracted mutagenic strains to prepare microbial mortar, and the highest strength reached 55 MPa, improving the splitting tensile strength and cyclic load resistance of the mortar [39]. Researchers found that the corrosion resistance of the materials was enhanced by MICP treatment. [PERSON] et al. used _Bacillus pasteurii_ to form a calcium carbonate covering on the concrete surface, which reduced the permeability of the test block and improved the resistance to alkali, acid, freeze-thaw and drying shrinkage [43]. [PERSON] et al. studied the effectiveness of the MICP process to control wind erosion through a wind tunnel test, and the higher wind speed was associated with a more obvious control effect [44]. [PERSON] et al. found that the sandy foreshore slope modified by MICP could resist 30 times the amount of tidal flow scouring [45]. As an emerging modification technology, MICP has proven its ability to improve the physical and chemical properties of materials.