title: soil organism
design: In this experiment, soil samples were collected from 15 sampling sites in Qinghai Province (including farmland, forestland, grassland, wasteland, wetland, and sandy land). Soil was collected from the 0 - 30 cm layer, with each 48 cm forming one sample group. There were three replicates for each depth. The soil nitrous oxide emission potential of different land use types in Qinghai Province was studied.