| Experimental treatments | Total C (mg∙kg−1) | Total N (mg∙kg−1) | Total P (mg∙kg−1) | Total K (mg∙kg−1) | C/N ratio | NO− 3-N (mg∙kg−1) | NH+ 4-N (mg∙kg−1) | Available phosphoric acid (mg∙kg−1) | Exchangeable potassium (mg∙kg−1) | pH | EC (mS∙cm−1) | |||||||||||||
| Organic fertilizer | 27,802 ± 1760 | Z | ** | y | 1616 ± 102.0 | n.s. | 1721 ± 50.2 | * | 5394 ± 106.4 | ** | 17.2 ± 1.21 | ** | 1.0 ± 0 | n.s. | 10.5 ± 7.6 | ** | 760.3 ± 225.6 | ** | 4851 ± 338.2 | ** | 7.4 ± 0.3 | ** | 3.38 ± 0.2 | ** |
| Chemical fertilizer | 19,119 ± 897 | 1793 ± 113.1 | 1504 ± 100.0 | 3107 ± 145.4 | 10.7 ± 0.6 | 2.5 ± 1.7 | 1806 ± 142.4 | 55.8 ± 10.9 | 1725 ± 89.6 | 5.6 ± 0.3 | 4.83 ± 0.5 | |||||||||||||