Macrospora coerulea as well as preparation method and application thereof

The invention discloses a coprophilous microsporus and a preparation method of the coprophilous microsporus, and the preparation method comprises the following steps: dissolving soil into water, stirring and precipitating to obtain an upper-layer suspension; preparing a purified culture medium, adding the upper-layer suspension liquid into the purified culture medium for primary culture, adding a rare earth solution into the purified culture medium as a selective agent in the culture process, and culturing to obtain a single strain; preparing a propagation culture medium, performing high-pressure sterilization, coating the single strain on the propagation culture medium according to a coating culture method, putting the propagation culture medium into an incubator, and performing propagation culture to obtain a strain after five days; and identifying and storing the strain to obtain the coecaria macrospora. The invention also discloses application of the coecaria macrospora in soil improvement and plant growt