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Table 1 Soil physical and chemical properties along soil depth

From: Vertical distribution patterns and drivers of soil bacterial communities across the continuous permafrost region of northeastern China

Soil depth layer

Temperature (℃)

Moisture (%)

Salinity (mS cm–1)

TC (g kg–1)

TN (g kg–1)

TP (g kg−1)

C/N

TOC (g kg–1)

AN (mg kg−1)

AP (mg kg−1)

pH

Clay (%)

Silt (%)

Sand (%)

Active layer (n = 30)

6.27 (0.31)a

41.22 (2.86)a

0.05 (0.005)

183.87 (11.70)a

9.40 (0.59)a

2.90 (0.22)a

19.67 (0.43)

33.62 (1.15)

1157.59 (80.80)

16.18 (1.73)a

5.21 (0.11)

1.31 (0.13)

19.74 (1.46)

78.95 (1.59)

Transition layer (n = 30)

2.43 (0.16)b

81.24 (3.82)b

0.06 (0.01)

128.00 (10.80)b

6.37 (0.57)b

2.20 (0.16)b

23.45 (2.86)

30.28 (1.31)

955.01 (61.17)

17.15 (1.95)a

5.13 (0.12)

1.70 (0.16)

24.21 (1.70)

74.09 (1.86)

Permafrost layer (n = 30)

−0.45 (0.05)c

75.58 (4.91)b

0.07 (0.01)

92.81 (7.41)c

5.00 (0.43)b

2.08 (0.09)b

20.46 (2.19)

31.08 (1.31)

1053.30 (103.30)

24.19 (3.27)b

5.17 (0.11)

1.84 (0.24)

25.03 (2.43)

73.14 (2.66)

  1. The values indicate means and standard error (in parentheses). The differences in soil properties among soil depth layers were analyzed using a one-way analysis of variance. Means significantly different (P < 0.05, Tukey’s HSD) are indicated with superscript contrasting letters
  2. TC, soil total carbon; TN, soil total nitrogen; TP, soil total phosphorus; C/N, soil C:N; TOC: soil total organic carbon; AN: soil available nitrogen; AP, soil available phosphorus