Table 1. Basic properties of soil samples under different fertilizer treatments.
| Treatment | SOC (g kg-1) |
TN (g kg-1) |
SMBC (mg kg-1) |
SMBN (mg kg-1) |
pH | WC (%) |
qMB (%) |
SMBN/TN (%) |
|---|---|---|---|---|---|---|---|---|
| CK | 25.35 ± 1.53 b | 2.27 ± 0.23 b | 446.13 ± 35.14 c | 28.28 ± 2.62 c | 7.14 ± 0.04 ab | 26.46 ± 1.79 b | 1.78 ± 0.33 b | 1.27 ± 0.40 b |
| NPK | 26.66 ± 1.61 b | 2.03 ± 0.25 b | 478.96 ± 39.56 c | 41.91 ± 3.70 bc | 7.06 ± 0.14 b | 31.58 ± 2.15 a | 1.80 ± 0.43 b | 2.09 ± 0.82 ab |
| M | 41.44 ± 1.20 a | 2.68 ± 0.25 a | 837.84 ± 69.17 b | 73.50 ± 6.75 a | 7.00 ± 0.23 b | 32.36 ± 2.90 a | 2.02 ± 0.12 b | 2.76 ± 0.52 a |
| MNPK | 37.99 ± 1.41 a | 3.02 ± 0.12 a | 1243.75 ± 103.58 a | 58.43 ± 5.60 ab | 7.50 ± 0.29 a | 32.33 ± 1.47 a | 3.28 ± 0.17 a | 1.93 ± 0.19 ab |
Notes: Different small letters indicate significant differences (P < 0.05) within the same column. CK: no fertilization; NPK: chemical fertilizer; M: organic fertilizer; MNPK: constant organic-inorganic fertilizer. SOC, total soil organic carbon; TN, total nitrogen; SMBC, soil microbial biomass carbon; SMBN, soil microbial biomass nitrogen; WC, soil water content; qMB, ratio of soil microbial biomass carbon to soil organic carbon; SMBN/TN, ratio of soil microbial nitrogen to total nitrogen in soil. (n = 3, mean ± SE)