|  | pH | NH4+–N (mg kg−1) | NO3−–N (mg kg−1) | TN (g kg−1) | SOC (g kg−1) | MBN (mg kg−1) | MBC (mg kg−1) |
---|---|---|---|---|---|---|---|---|
Tillering | N120 | 6.08 ± 0.07c | 21.8 ± 1.23c | 23.5 ± 1.06c | 1.31 ± 0.10c | 9.9 ± 0.57c | 7.2 ± 0.88d | 69.2 ± 5.5c |
 | N180 | 6.47 ± 0.27b | 25.5 ± 2.24b | 37.4 ± 1.78a | 1.48 ± 0.10b | 10.7 ± 0.87bc | 8.7 ± 0.18cd | 80.2 ± 2.7c |
 | N240 | 5.68 ± 0.25d | 23.0 ± 1.43bc | 34.5 ± 0.52a | 1.58 ± 0.08ab | 11.7 ± 0.65b | 9.9 ± 0.48c | 100.0 ± 11.0b |
Heading | N120 | 7.27 ± 0.17a | 15.4 ± 1.38d | 31.2 ± 1.76b | 1.49 ± 0.04b | 10.9 ± 0.80bc | 19.6 ± 2.06b | 105.1 ± 15.0b |
 | N180 | 6.27 ± 0.11bc | 23.6 ± 0.74bc | 36.3 ± 1.70a | 1.51 ± 0.03b | 11.6 ± 0.22b | 21.0 ± 1.63b | 168.9 ± 10.6a |
 | N240 | 5.55 ± 0.12d | 35.2 ± 2.89a | 37.3 ± 1.95a | 1.70 ± 0.03a | 13.0 ± 0.13a | 29.7 ± 0.89a | 112.6 ± 14.0b |