样地编号

土层/cm

0~20

20~40

40~60

0~60

S1

3.06 ± 1.07^a

2.51 ± 4.02^a

1.94 ± 0.07^a

7.17 ± 2.70^ab

S2

2.81 ± 3.24^ac

2.25 ± 0.72^a

1.73 ± 1.19^a

6.56 ± 3.21^a

S3

3.35 ± 0.76^a

2.79 ± 1.33^ab

2.18 ± 0.66^ac

8.04 ± 5.41^a

S4

4.87 ± 2.27^ab

4.24 ± 1.48^a

3.46 ± 2.35^a

8.31 ± 1.85^ac

S5

5.13 ± 1.98^a

4.41 ± 2.65^a

3.63 ± 1.08^a

9.28 ± 6.27^a

S6

5.52 ± 4.26^a

4.69 ± 0.76^ab

3.77 ± 0.89^ab

9.96 ± 4.52^a

S7

2.19 ± 1.54^b

1.75 ± 1.26^ac

1.23 ± 1.17^c

5.53 ± 2.45^bc