| 复垦年限(a) | 植被 | 有机质 | 全氮 | 碱解氮 | 全磷 | 速效磷 |
| (g/kg) | (g/kg) | (mg/kg) | (g/kg) | (mg/kg) | ||
| 2a | 苜蓿 | 4.47b | 1.84a | 23.82b | 6.26a | 67.66e |
| 2a | 油松 | 3.24dc | 0.75c | 14.29c | 3.2c | 82.32d |
| 5a | 苜蓿 | 4.55ba | 1.32b | 24.89b | 5.46b | 68.55e |
| 5a | 山杏 | 2.56dfe | 1.6a | 9.75de | 0.91f | 10.9f |
| 10a | 苜蓿 | 3.01c | 0.73dc | 25.45ba | 3.04c | 80.22d |
| 10a | 沙棘 | 2.24fe | 1.22b | 27.88a | 2.3d | 138.17b |
| 15a | 油松 | 2.58dce | 0.66dc | 7fe | 1.1f | 118.71c |
| 15a | 沙棘 | 2.07fe | 1.14b | 12.34dc | 1.85e | 122.33c |
| 15a | 油松×沙棘 | 5.16a | 0.48d | 14.07c | 3.14c | 157.69a |
| 未复垦 | 裸地 | 1.88f | 0.12e | 5.8f | 1.09f | 67e |