| abstract |
The invention belongs to the technical field of environmental biology, and in particular relates to a rapid cultivation method of fungi and fungi-cyanobacteria composite lichen crusts. The exopharyngeal mold Zh2 screened in the present invention belongs to high-yielding exopolysaccharide strains. The exovial mold Zh2 and cyanobacteria are compounded and applied to the artificial sand fixation of biological crusts. On the one hand, exovial mold Zh2 can provide a carbon source for the growth of cyanobacteria, and on the other hand On the one hand, it can cement sand grains to form stable aggregates, increase soil carbon and nitrogen content and soil enzyme activity, improve soil physical and chemical properties, and significantly promote soil nutrient levels. In the invention, the fungi and cyanobacteria are mixed and inoculated in the quicksand, which can quickly form a stable composite crust, has a short cultivation period, improves the stability of the artificial crust, and accelerates the succession process of the algal crust to the lichen crust. The fungi-cyanobacteria composite lichen crusts cultivated in the present invention have significantly higher drought resistance than single algal crusts, indicating that the composite crusts can better adapt to the harsh environment in arid areas. |