Abstract：
Aerosol emission by wind erosion in the arid and semi-arid areas of the world, is of environmental and health significance. Different methods have been used to mitigate aerosol emission among which the biological methods may be the most efficient ones. Although previously investigated, more research is essential to determine how the use of exopolysaccharide (biocrust)-producing cyanobacteria may affect soil physical properties. The objective was to investigate the effects of the cyanobacteria, Microcoleus vaginatus ATHK43 (identified and registered by the NCBI accession number MW433686), on soil physical properties of a sandy soil 15, 30, 60, and 90 d after inoculation. The effects of cyanobacterial biocrust on soil properties including shear strength, soil resistance, aggregate stability (mean weight diameter (MWD) and geometric mean diameter (GMD)), and wind erosion were determined in trays using a wind tunnel. Cyanobacterial inoculation significantly increased MWD (0-1 cm depth, from 0.12 mm to 0.47 mm) and GMD (from 0.3 to 0.5 mm) after a period of 90 d. Biocrust production significantly decreased soil erosion from 55.7 kgm- 2 to 0.3 kgm- 2 (wind rate of 50 kmh- 1), and from 116.42 kgm- 2 to 0.6 kgm- 2 (wind rate of 90 kmh- 1) after 90 d. In conclusion, cyanobacterial biocrust can significantly improve soil physical properties in different parts of the world including the deserts, and reduce aerosol emission by mitigating the destructive effects of wind erosion on soil physical properties.
摘要：
世界干旱和半干旱地区风蚀产生的气溶胶排放,具有环境和健康意义。已经使用了不同的方法来减轻气溶胶排放，其中生物方法可能是最有效的方法。虽然以前调查过，更多的研究对于确定使用产生胞外多糖（生物）的蓝细菌如何影响土壤物理性质至关重要。目的是研究蓝细菌的影响，阴道MicrocoleusvaginatusATHK43（由NCBI登录号MW433686鉴定和注册），接种后15、30、60和90d对沙质土壤物理性质的影响。蓝藻生物对土壤性质的影响，包括剪切强度，土壤阻力，骨料稳定性(平均重量直径(MWD)和几何平均直径(GMD))，使用风洞在托盘中确定风蚀。蓝细菌接种显着增加MWD（0-1cm深度，90d后，从0.12mm到0.47mm）和GMD（从0.3到0.5mm）。Biocrust生产将土壤侵蚀从55.7kgm-2显着降低到0.3kgm-2（风速为50kmh-1），90d后从116.42kgm-2到0.6kgm-2(风速为90kmh-1)。总之，蓝藻生物可以显着改善包括沙漠在内的世界不同地区的土壤物理性质，并通过减轻风蚀对土壤物理性质的破坏性影响来减少气溶胶排放。
