Table 2 Significance of relationships between enzyme activities and soil characteristics as well as root decomposition rates (Dong et al. 2020) across 36 different forms of N treatments plots

Soil C (mg C g⁻¹ soil)

ns

ns

ns

ns

ns

ns

Soil C:N

ns

ns

ns

ns

ns

ns

Soil P (μg P g⁻¹ soil)

ns

ns

ns

ns

ns

ns

Soil DOC (μg C g⁻¹ soil)

0.51 (+)**

0.60 (+)**

ns

0.49 (+)**

ns

ns

Soil MBC (μg C g⁻¹ soil)

0.56 (+)***

0.63 (+)***

ns

0.41 (+)*

ns

ns

Microbial biomass C:N

ns

ns

ns

ns

ns

ns

pH

ns

ns

ns

ns

0.43 (−)***

0.58 (−)***

Decomposition rate (year⁻¹)

ns

ns

ns

ns

ns

ns