Table 1.
Soil biochemical properties among different fertilization regimes.
| pH | SOC (mg g−1) | TN (mg g−1) | AP (μg g−1) | AK (μg g−1) | PTA (μg g−1 h−1) | UEA (μg g−1 h−1) | ITA (mg g−1 h−1) | |
|---|---|---|---|---|---|---|---|---|
| CK | 8.11 ± 0.08a | 6.16 ± 0.45b | 0.55 ± 0.05c | 8.27 ± 0.58a | 96.70 ± 16.56bc | 1.76 ± 0.28b | 16.97 ± 3.05b | 0.90 ± 0.31b |
| NK | 8.27 ± 0.04a | 5.99 ± 0.67b | 0.61 ± 0.05bc | 18.61 ± 19.33a | 135.66 ± 7.24abc | 2.02 ± 0.21b | 20.03 ± 2.06ab | 2.22 ± 1.18b |
| NP | 8.12 ± 0.01a | 7.59 ± 0.85ab | 0.72 ± 0.03abc | 11.54 ± 2.80a | 92.83 ± 12.41c | 1.43 ± 0.41b | 20.25 ± 3.11ab | 1.75 ± 0.90b |
| LNPK | 8.18 ± 0.08a | 7.88 ± 0.46ab | 0.57 ± 0.04c | 11.33 ± 2.57a | 144.77 ± 21.95ab | 1.68 ± 1.05b | 17.01 ± 2.15b | 2.26 ± 0.88b |
| HNPK | 7.82 ± 0.34a | 8.10 ± 0.77ab | 0.64 ± 0.05abc | 10.55 ± 5.38a | 114.63 ± 2.70abc | 2.02 ± 0.21b | 22.08 ± 1.31ab | 2.67 ± 0.58ab |
| MNPK | 8.08 ± 0.00a | 9.38 ± 1.03a | 0.75 ± 0.05ab | 12.29 ± 2.24a | 123.42 ± 31.26abc | 3.39 ± 0.99ab | 23.94 ± 1.84a | 2.53 ± 0.86b |
| SNPK | 7.95 ± 0.27a | 9.06 ± 1.69a | 0.82 ± 0.14a | 8.44 ± 0.82a | 151.46 ± 14.17a | 4.10 ± 1.20a | 22.82 ± 0.40ab | 4.81 ± 0.25a |
Means ± standard deviations (n = 3). Significant differences between means at α = 0.05 level detected by Tukey's HSD test are labeled with different letters. SOC, soil organic C; TN, total N; AP, available P; AK, available K; PTA, phosphatase activity; UEA, urease activity; ITA, invertase activity. CK, unfertilized control; LNPK, low N and regular PK fertilizers; HNPK, high N and regular PK fertilizers; MNPK, organic manure plus NPK fertilizers; SNPK, maize straw plus NPK fertilizers.