Parameters | Planting age (y) | |||||
---|---|---|---|---|---|---|
0 | 1 | 4 | 6 | 10 | 13 | |
SOM (g·kg−1) | 23.54 ± 1.72 bc | 21.45 ± 4.01 bc | 21.15 ± 1.15 c | 21.54 ± 1.94 bc | 25.48 ± 1.51 b | 30.07 ± 0.93 a |
pH | 8.11 ± 0.03 a | 8.16 ± 0.03 a | 8.12 ± 0.06 a | 8.18 ± 0.01 a | 8.16 ± 0.03 a | 8.22 ± 0.03 a |
AP (mg·kg−1) | 118.6 ± 22.41 bc | 100.9 ± 8.32 bc | 98.23 ± 4.70 c | 121.3 ± 2.40 bc | 147.9 ± 12.70 a | 123.57 ± 12.43b |
TN (g·kg−1) | 1.32 ± 0.13 b | 1.17 ± 0.23 b | 1.19 ± 0.09 b | 1.23 ± 0.15 b | 1.43 ± 0.06 b | 1.67 ± 0.03 a |
C/N | 10.34 ± 0.33 a | 10.62 ± 0.20 a | 10.32 ± 0.19 a | 10.21 ± 0.36 a | 10.35 ± 0.22 a | 10.46 ± 0.15 a |
TEB (coml·m−2) | 27.22 ± 0.47 a | 25.91 ± 0.47 b | 25.7 ± 0.85 bc | 25.27 ± 0.12 bc | 25.26 ± 0.17 bc | 24.99 ± 0.37 c |
K+ (coml·m−2) | 0.65 ± 0.05 a | 0.57 ± 0.08 ab | 0.53 ± 0.07 b | 0.5 ± 0.04 b | 0.51 ± 0.05 b | 0.47 ± 0.05 b |
Ca2+ (coml·m−2) | 23.08 ± 0.41 a | 21.73 ± 0.24 b | 21.58 ± 0.09 b | 21.43 ± 0.63 b | 21.14 ± 0.24 b | 21.03 ± 0.33 b |
Na+ (coml·m−2) | 1.11 ± 0.20 a | 0.94 ± 0.08 ab | 0.89 ± 0.03 ab | 0.84 ± 0.22 ab | 0.83 ± 0.15 b | 0.74 ± 0.03 b |
Mg2+ (coml·m−2) | 2.86 ± 0.03 a | 2.84 ± 0.07 a | 2.68 ± 0.01 b | 2.49 ± 0.05 c | 2.45 ± 0.06 c | 2.44 ± 0.06 c |