3.2 Relationship between soil microorganism biomass and soil environmental factors
The sample sequences of all stands were clustered, and the results showed that the bacterial communities of the samples consisted of 36 phyla, 78 classes, 148 orders, 276 families, 464 genera, and 900 species. At the level of similarity of 0.97, 2922 operational taxonomic units (OTUs) were classified in the bacterial samples. The fungal communities of the samples consisted of 10 kingdoms, 27 phyla, 46 classes, 71 orders, 88 families, 96 genera, and 132 species. At the level of similarity of 0.97, 2922 OTUs were classified in the fungal samples. Each OTU has its corresponding species, and many different OTUs correspond to the same species. Combining OTUs of the same species and statistically analyzing the changes of species composition among different samples enables the diversity of microflora among different samples to be understood.