XS: Xanthoceras sorbifolia ; HR: Hippophae rhamnoides ; CK:Caragana korshinskii ; GL: Grassland. Capital letters indicate that there are significant differences (P < 0.05) between vegetation types under the same soil layer (n = 12). The error is the standard error.
Table 3. Two-factor ANOVA analysis was used to test the differences in soil organic carbon components (microbial biomass carbon, MBC; easily oxidized carbon, EOC; particulate organic carbon, POC; soil organic carbon, SOC) and enzyme activities (amylase; catalase; urease; invertase). VT: vegetation type, SD: soil depth.