3.1 Soil physicochemical properties
There was no significant difference in TC and TN between SF and PB, and the values in CSF were significantly lower than those in SF and PB (Fig. 1A, B). Soil pH was all acidic, and the values in SF were significantly higher than those in PB, and the values in CSF were significantly lower than those in SF but significantly higher than those in PB (Fig. 1C). AP in SF was significantly lower than that in PB and that in CSF was significantly lower than that in PB, but there was no significant difference from that in SF (Fig. 1D). NO3--N and NH4+-N were the highest in SF, and NH4+-N was significantly higher than that in PB, but there was no significant difference in NO3--N (Fig. 1E, F). NO3--N and NH4+-N in CSF were significantly lower than those in SF, but there was no significant difference between them and the values in PB. SWW in SF was significantly higher than that in PB, and its value in CSF was significantly lower than that in SF but had no significant difference from that in PB (Fig. 1G). SBD in SF was significantly lower than that in PB, and its value in CSF was significantly higher than that in SF and PB (Fig. 1H).