Bioinformatic analysis
We extracted DNA from the soil samples and implemented PCR amplification. We then constructed our library and assessed its quality. We operated the Illumina NovaSeq 6000 platform to quantify and sequence the constructed library for soil fungi. We then used non-clustering direct denoising to generate operational taxonomic units (OTUs) and identified the fungus at the genus level (Detailed supplementary methods in Section S1.1 in Supporting information).