Table 1 Biogeochemical properties of the four dryland soil types, i.e., forest, agriculture, grassland and desert soils, examined in this work.

From: Sulfur-mediated transformation, export and mineral complexation of organic and inorganic C, N, P and Si in dryland soils

Soil type

ID

 

pH

Water

C/N

Soil texturea

Soil

EC

content

STC

STN

STH

STS

SOC

δ13C-SOC

SIC

Sand

Silt

Clay

Classficationa

mS/cm

(%)

g/kg

g/kg

g/kg

g/kg

g/kg

(‰)

g/kg

%

%

%

Forest

XJ-S-1

Greyzem

5.63

0.518

17.9

-

2.73

11.0

0.281

46.5

-25.06

-

-

6.2

85.5

8.3

XJ-S-3

Greyzem

7.56

3.6

0.9

15.8

6.62

5.93

4.12

5.86

-21.04

9.9

2.98

32.4

62.1

5.5

XJ-S-4

Greyzem

6.72

0.144

36.7

135.7

7.96

21.6

1.05

107.1

-24.76

28.5

21.3

13.6

75.7

10.8

XJ-S-5

Greyzem

6.85

0.252

13.3

101.4

6.86

19.3

0.766

79.7

-26.02

21.7

18.5

14.2

77.4

8.3

XJ-S-13

Leptosols

7.41

0.198

8.9

26.2

2.05

8.23

0.497

18.9

-26.93

7.3

16.0

62.7

29.1

8.2

Average (forest)

5

 

6.83 ± 0.76

0.94 ± 1.5

15.6 ± 13.4

69.8 ± 58.2

5.2 ± 2.7

13.2 ± 6.9

1.3 ± 1.6

51.6 ± 42.0

24.76 ± 2.25

16.9 ± 10.0

15.7 ± 7.4

25.8 ± 22.8

66.0 ± 22.3

8.2 ± 1.9

Agriculture

XJ-S-14

Kastanozems

7.48

0.283

6.3

32.5

2.19

7.1

0.465

19.5

-26.16

13.1

18.5

12.1

81.1

6.8

XJ-S-15

Anthrosols

7.81

0.284

1.0

20.7

1.34

6.4

0.265

10.5

-25.74

10.2

19.3

9.5

82.6

8.0

XJ-S-16

Gypsosols

7.21

0.634

13.9

41.5

3.06

9.6

0.639

24.3

-25.97

17.2

16.9

54.4

32.6

13.0

XJ-S-17

Gypsosols

7.96

10.2

1.2

13.3

0.395

6.0

5.0

0.743

-24.02

12.6

42.2

48.6

46.7

4.7

Average (agriculture)

4

 

7.62 ± 0.34

2.84 ± 4.9

5.6 ± 6.1

27.0 ± 12.5

1.8 ± 1.1

7.3 ± 1.6

1.6 ± 2.3

13.8 ± 10.4

25.47 ± 0.98

13.3 ± 2.90

24.3 ± 12.0

31.1 ± 23.6

60.7 ± 25.1

8.1 ± 3.5

Grassland

XJ-S-2

Calcisol

7.15

2.47

2.9

16.9

2.32

5.90

4.21

5.284

-22.82

11.6

9.1

12.6

81.1

6.3

XJ-S-9

Arenosols

6.97

0.252

25.9

75.2

7.59

16.4

8.1

53.8

-25.98

21.4

12.4

12.1

78.3

9.6

XJ-S-12

Kastanozems

7.96

0.302

2.39

29.9

2.75

6.88

0.792

23.3

-26.22

6.6

13.6

49.0

41.8

9.2

XJ-S-21

Solonchaks

7.68

6.13

0.375

13.0

0.469

3.63

0.800

1.449

-24.33

11.5

34.5

57.6

39.8

2.6

XJ-S-22

Solonchaks

7.49

0.129

5.63

18.6

0.912

5.81

0.291

8.623

-24.89

10.0

25.5

53.7

39.7

6.6

XJ-S-23

Gypsosols

7.99

11.4

2.18

11.5

0.605

9.56

23.8

1.290

-24.87

10.2

23.7

56.3

41.3

2.4

Average (grassland)

6

 

7.54 ± 0.42

3.44 ± 4.5

6.6 ± 9.6

27.5 ± 24.3

2.4 ± 2.7

8.0 ± 4.5

6.3 ± 9.1

15.6 ± 20.4

24.85 ± 1.23

11.9 ± 5.02

19.8 ± 9.7

40.2 ± 21.8

53.7 ± 20.2

6.1 ± 3.1

Desert land

XJ-S-7

Anthrosols

7.61

8.2

-

8.0

0.554

10.7

24.6

0.873

-22.77

7.17

18.2

22.3

70.4

7.3

XJ-S-8

Anthrosols

7.54

2.33

1.64

5.5

0.228

6.36

9.09

1.61

-21.99

3.92

30.3

68.4

27.6

5.0

XJ-S-10

Gypsosols

7.71

4.04

1.04

8.5

0.208

6.75

5.55

1.39

-24.43

7.13

51.2

12.1

78.3

9.6

XJ-S-11

Gypsosols

7.81

2.48

0.550

8.2

0.197

3.51

2.14

0.842

-23.42

7.34

51.8

48.5

43.3

7.9

XJ-S-18

Gypsosols

8.04

8.01

3.41

15.7

0.363

3.98

2.28

1.34

-24.31

14.4

54.1

73.0

17.9

9.1

Average

(desert land)

5

-

7.74 ± 0.20

5.0 ± 2.9

1.7 ± 1.5

9.2 ± 3.8

0.31 ± 0.15

6.3 ± 2.8

8.7 ± 9.3

1.21 ± 0.340

23.39 ± 1.03

7.99 ± 3.85

41.1 ± 16.0

44.9 ± 27.1

47.5 ± 26.3

7.8 ± 1.8

Range among all soils

—

—

5.63–8.04

0.13–11.4

0.38-49.0

5.5-135.7

0.20-8.0

3.5–19.3

0.26–24.6

0.743–107.1

-26.93–21.04

3.92–28.5

2.4–43.3

6.2–73.0

17.9–85.5

2.4–13.0

  1. Soil classification is based on the Harmonized World Soil Database (HWSD).
  2. The sign ‘±’ indicates the standard deviation (STDEV) among soil samples.
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