Table 5 SOC content and density for the 22 Genetic Soil Classification of China soil groups in east China

Brown coniferous forest soils

Umb-Cryic Cambisols

24

106 ± 56.4

10.8 ± 9.11

27.2 ± 14.0

8.01 ± 4.78

13.8 ± 11.5

21.8 ± 15.3

Bleach Spodosol

Umb-Cryic Cambisols

6

95.7 ± 8.89

5.49 ± 0.22

24.3 ± 15.5

13.7 ± 11.1

6.43 ± 0.84

20.1 ± 10.3

Floodplain forest soils

Dark-Aquic Cambosols

3

3.40 ± 1.13

0.71 ± 0.23

1.17 ± 0.47

0.49 ± 0.16

0.94 ± 0.37

1.43 ± 0.53

Peat soils

Fibri-Permagelic Histosols

6

171 ± 31.1

186 ± 21.6

180 ± 4.07

4.10 ± 0.55

12.8 ± 0.59

16.9 ± 1.14

Dark-brown earths

Dark-Aquic Cambosols/Bori-Udic Cambosols/Mollic Boric Luvisols

87

26.5 ± 18.9

8.55 ± 8.13

13.1 ± 9.56

6.31 ± 3.83

6.63 ± 5.87

12.9 ± 8.26

Albic soil

Albic-Boric Luvisols

12

30.9 ± 25.9

2.24 ± 1.33

6.85 ± 4.16

4.70 ± 2.58

2.49 ± 1.61

7.19 ± 3.89

Cinnamon soils

Hapli-Ustic Luvisols/Hapli-Ustic Cambosols

36

10.3 ± 9.21

5.48 ± 3.46

6.80 ± 4.19

2.56 ± 1.65

3.52 ± 4.57

6.08 ± 4.46

Moisture soils

Ochri-Aquic Cambosols

12

8.23 ± 6.07

6.88 ± 6.14

4.98 ± 2.68

2.69 ± 2.67

3.71 ± 1.16

6.51 ± 3.41

Brown earths

Hapli-Udic Luvisols

27

40.9 ± 25.1

6.86 ± 7.38

23.7 ± 13.6

10.4 ± 8.89

4.67 ± 5.32

15.0 ± 9.36

Coastal solonchaks

Aqui-Orthic Halosols

6

8.46 ± 5.06

5.36 ± 3.82

2.70 ± 0.26

1.18 ± 0.38

2.54 ± 0.65

3.71 ± 0.26

Chestnut soils

Calci-Ustic Lsohumosols

3

3.35 ± 0.98

11.6 ± 3.40

1.62 ± 0.48

0.96 ± 0.28

1.56 ± 0.74

2.53 ± 0.46

Skeletal soil

Lit-Ust-Alluvic Entisols

3

1.89 ± 0.31

1.57 ± 0.51

1.76 ± 0.57

1.92 ± 0.62

1.27 ± 0.41

3.19 ± 1.03

Lime concretion black soils

Shajiang Calci-Aquic Vertosols

6

6.92 ± 1.69

3.04 ± 1.56

5.08 ± 0.59

3.07 ± 0.91

2.98 ± 0.43

6.05 ± 0.47

Yellow-cinnamon soils

Hap-Ustic Luvisols

3

5.88 ± 1.45

4.59 ± 1.61

4.89 ± 1.29

1.87 ± 0.49

5.43 ± 0.93

7.30 ± 1.62

Red earths

Rhodi-Udic Ferralsols/Ferri-Udic Cambosols/Ali-Perudic Cambosols

39

13.5 ± 9.13

5.49 ± 5.05

7.15 ± 5.13

2.91 ± 1.43

5.91 ± 5.86

8.82 ± 6.65

Yellow earths

Hapli-Udic Ferralsols/Hap-Udic Luvisols

9

36.4 ± 26.8

8.91 ± 7.44

13.4 ± 15.4

4.01 ± 2.67

6.82 ± 6.97

10.8 ± 9.44

Yellow-brown soil

Hap-Udic Luvisols

6

9.10 ± 4.82

3.83 ± 1.77

5.00 ± 2.25

2.53 ± 0.93

4.18 ± 2.06

6.71 ± 2.99

Lateritic red earths

Ferric-Udic Cambisols

30

29.8 ± 18.8

13.2 ± 9.69

17.9 ± 14.7

6.21 ± 4.71

10.3 ± 6.74

16.5 ± 8.40

Latosols

Rhodi-Udic Ferralsols/Hap-Udic Ferrisols

12

22.1 ± 15.9

15.5 ± 10.2

17.7 ± 12.6

3.86 ± 3.02

6.41 ± 3.35

10.3 ± 4.15

Limestone soils

Black-Lithomorphic Isohumosols/Calci-Udic Ferrisols

6

72.9 ± 12.4

34.3 ± 3.85

49.0 ± 10.1

12.8 ± 2.87

20.3 ± 3.88

33.1 ± 6.76

Volcanic soils

Hapli-Udic Andosols

6

75.0 ± 12.7

50.4 ± 18.0

55.7 ± 16.9

9.42 ± 0.62

25.6 ± 2.87

35.0 ± 2.26

Purplish soils

Purpli-Udic Cambosols

6

16.4 ± 6.25

6.38 ± 1.15

11.2 ± 2.78

4.47 ± 1.96

2.42 ± 0.61

6.89 ± 2.57