TABLE 2.
Soil physicochemical properties when sampling tobacco (mean ± SD). CF, VOF, HOF, WOF, and COF represent the treatments of tobacco-special chemical fertilizer, vermicompost-based, humic acid-based, wood biochar-based, and compound functional organic fertilizers, respectively. Different letters within each column show a significant difference in soil physicochemical properties based on Duncan’s method (p < 0.05).
| pH | NO3 −-N (mg kg−1) | NH4 +-N (mg kg−1) | Available P (mg kg−1) | Available K (mg kg−1) | CEC (cmol+ kg−1) | OM (g kg−1) | TOC (g kg−1) | TC (%) | TN (%) | |
|---|---|---|---|---|---|---|---|---|---|---|
| CF | 6.73 ± 0.09 b | 4.37 ± 1.71 a | 3.04 ± 0.02 b | 53.2 ± 13.0 c | 342.7 ± 18.3 b | 19.6 ± 1.5 ab | 32.9 ± 4.1 a | 19.1 ± 2.4 a | 3.18 ± 0.47 ab | 0.22 ± 0.02 a |
| VOF | 6.80 ± 0.19 b | 4.46 ± 0.10 a | 4.82 ± 1.02 ab | 94.4 ± 17.0 a | 410.9 ± 42.5 a | 20.2 ± 0.8 ab | 34.9 ± 4.7 a | 20.2 ± 2.7 a | 3.23 ± 0.40 ab | 0.23 ± 0.01 a |
| HOF | 6.74 ± 0.15 b | 4.19 ± 1.28 a | 5.32 ± 1.04 a | 96.3 ± 12.3 a | 373.9 ± 2.0 ab | 20.1 ± 0.9 ab | 36.3 ± 4.6 a | 21.0 ± 2.7 a | 3.34 ± 0.39 a | 0.23 ± 0.02 a |
| WOF | 6.94 ± 0.18 a | 4.10 ± 1.01 a | 3.32 ± 1.06 b | 84.1 ± 28.3 ab | 369.3 ± 27.2 ab | 20.8 ± 0.8 b | 34.9 ± 6.6 a | 20.3 ± 3.8 a | 3.07 ± 0.13 ab | 0.22 ± 0.01 a |
| COF | 6.75 ± 0.04 b | 3.37 ± 0.89 a | 2.97 ± 0.23 b | 70.0 ± 6.6 bc | 332.6 ± 35.7 b | 17.8 ± 2.6 a | 30.5 ± 4.0 a | 17.7 ± 2.3 a | 2.95 ± 0.37 b | 0.22 ± 0.02 a |