土层深度/cm Soil depth | 9a生 Nine years | 16a生 Sixteen years | 28a生 Twenty-eight years |
0~10 | 76.85 ± 10.97 | 65.61 ± 10.69 | 67.26 ± 7.49 |
10~20 | 38.22 ± 6.77 | 46.21 ± 2.01 | 32.40 ± 4.96 |
20~30 | 36.05 ± 7.35 | 28.31 ± 6.92 | 23.75 ± 5.89 |
30~40 | 22.95 ± 0.55 | 22.52 ± 5.39 | 14.06 ± 8.37 |
40~50 | 11.94 ± 5.77 | 16.52 ± 4.56 | 9.76 ± 10.19 |
50~60 | 8.78 ± 1.16 | 10.32 ± 1.28 | 4.08 ± 7.06 |
60~70 | 6.19 ± 1.63 | 4.60 ± 2.25 | 2.27 ± 3.93 |
70~80 | 3.34 ± 0.58 | 1.41 ± 1.00 | - |
80~90 | 1.04 ± 1.81 | - | - |