TABLE 1.
Tobacco leaf quality parameters (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 show a significant difference within each column based on Duncan’s method (p < 0.05).
| Nicotine (%) | Total sugar (%) | Reducing sugar (%) | Total nitrogen (%) | K2O (%) | Cl (%) | Total sugar/nicotine | Reducing sugar/nicotine | Total nitrogen/nicotine | K2O/Cl | |
|---|---|---|---|---|---|---|---|---|---|---|
| CF | 2.48 ± 0.16 a | 25.8 ± 2.5 b | 20.1 ± 1.5 c | 1.88 ± 0.08 a | 2.07 ± 0.00 b | 0.70 ± 0.14 a | 10.5 ± 1.6 b | 7.6 ± 0.2 b | 0.76 ± 0.05 a | 2.93 ± 0.05 c |
| VOF | 2.31 ± 0.19 b | 31.8 ± 3.1 a | 25.0 ± 2.6 a | 1.70 ± 0.09 b | 2.14 ± 0.11 ab | 0.47 ± 0.08 b | 13.8 ± 2.1 a | 10.9 ± 1.7 a | 0.74 ± 0.09 a | 4.51 ± 0.17 a |
| HOF | 2.42 ± 0.10 ab | 29.5 ± 2.9 ab | 23.5 ± 2.9 ab | 1.82 ± 0.32 ab | 2.17 ± 0.29 ab | 0.67 ± 0.04 a | 12.3 ± 0.7 ab | 9.8 ± 0.8 ab | 0.69 ± 0.10 a | 3.23 ± 0.71 b |
| WOF | 2.41 ± 0.04 ab | 28.9 ± 3.3ab | 23.4 ± 3.2 ab | 1.76 ± 0.14 ab | 2.27 ± 0.05 a | 0.69 ± 0.12 a | 12.0 ± 1.4 ab | 9.7 ± 1.4 ab | 0.73 ± 0.05 a | 3.29 ± 0.63 b |
| COF | 2.33 ± 0.13 b | 28.9 ± 2.0 ab | 21.7 ± 2.0 bc | 1.71 ± 0.14 b | 2.17 ± 0.18 ab | 0.64 ± 0.18 a | 12.7 ± 1.0 ab | 9.8 ± 0.9 ab | 0.71 ± 0.03 a | 3.39 ± 0.39 b |