| Treatment | pH | SOC g kg−1 | Available N mg∙kg−1 | Available P mg∙kg−1 | Available K mg∙kg−1 |
| CK | 4.33 ± 0.03a | 20.8 ± 0.7a | 216.8 ± 7.3bc | 82.1 ± 3.1a | 123.1 ± 2.4a |
| RB300 | 4.48 ± 0.04bc | 26.3 ± 0.6b | 207.6 ± 9.2abc | 94.4 ± 0.7b | 528.1 ± 27.7d |
| RB400 | 4.53 ± 0.04cd | 26.3 ± 0.3b | 187.4 ± 7.3a | 93.9 ± 2.7b | 568.8 ± 21.7e |
| RB500 | 4.58 ± 0.03d | 25.0 ± 3.1b | 190.8 ± 6.0a | 93.9 ± 2.6b | 623.8 ± 10.5f |
| CB300 | 4.45 ± 0.02b | 25.9 ± 0.7b | 227.9 ± 19.9c | 100.5 ± 1.4c | 362.5 ± 10.2bc |
| CB400 | 4.46 ± 0.02bc | 26.3 ± 0.8b | 218.7 ± 3.7bc | 102.7 ± 1.3c | 390.6 ± 12.0c |
| CB500 | 4.43 ± 0.04b | 27.0 ± 1.2b | 198.5 ± 6.0ab | 104.3 ± 2.1c | 350.0 ± 10.2b |