层次 | 氮处理 | 丰富度(D) | 多样性(H') | 优势度(C) | 均匀度(J) | Group number | Total number |
0~10 cm | CK | 3.32 ± 0.28 | 1.98 ± 0.11 | 0.78 ± 0.02 | 0.39 ± 0.03 | 206.78 ± 43.93 | 18.11 ± 1.72 |
| LN | 3.06 ± 0.29 | 1.92 ± 0.11 | 0.77 ± 0.02 | 0.38 ± 0.02 | 165 ± 28.33 | 16.44 ± 1.50 |
| MN | 2.86 ± 0.26 | 1.85 ± 0.10 | 0.76 ± 0.02 | 0.37 ± 0.02 | 180.22 ± 35.18 | 15.44 ± 1.41 |
| HN | 2.95 ± 0.22 | 1.88 ± 0.09 | 0.77 ± 0.02 | 0.37 ± 0.02 | 223.44 ± 55.50 | 16.33 ± 1.72 |
10~20 cm | CK | 2.94 ± 0.23 | 1.83 ± 0.11 | 0.74 ± 0.03 | 0.47 ± 0.04 | 62.89 ± 11.94 | 12.78 ± 1.09 |
| LN | 2.54 ± 0.25 | 1.76 ± 0.15 | 0.74 ± 0.05 | 0.49 ± 0.04 | 37.67 ± 5.47 | 10.33 ± 1.11 |
| MN | 2.50 ± 0.21 | 1.68 ± 0.11 | 0.71 ± 0.04 | 0.46 ± 0.04 | 46 ± 6.96 | 10.33 ± 0.99 |
| HN | 2.82 ± 0.25 | 1.87 ± 0.11 | 0.75 ± 0.04 | 0.51 ± 0.06 | 52.33 ± 12.14 | 11.44 ± 0.97 |