Conclusion

The possibility of using the byproduct from desulfurization processes for amelioration of alkali soil is examined, to provide incentives for the construction of desulfurization processing facilities in China. It was shown that applying mixtures of 0.5 wt % of the byproduct from semi-dry process, which tends to be adopted owing to its low construction and

Table 10.6. Chemical analyses of soil after harvesting of wheat

source of Gypsum

5/20 8/2 9/24 5/20 8/2 9/24 5/20 8/2 9/24 5/20 8/2 9/24 5/20 8/2 9/24 5/20 8/2 9/24

1 wet 0.5 10.12 8.20 7.09 5.15 8.38 6.28 4.60 2.59 1.99 0.064 0.207 0.266 2.20 0.42 0.00 17.8 3.6 0.0

2

semi-dry

0.5

8.42

8.65

5.23

8.34

8.66

4.57

3.08

3.00

0.128

0.274

0.246

1.99

0.84

0.00

16.7

6.7

0.0

9.72

3

control

0

10.52

9.47

9.20

4.83

5.16

5.72

2.81

2.30

2.50

0.030

0.727

0.336

4.36

3.48

2.13

36.3

29.9

20.0

4

control

0

10.37

9.60

9.10

5.18

5.99

4.82

2.40

1.69

1.74

0.000

0.205

0.170

2.91

3.27

2.35

27.7

29.3

25.9

5

wet

0.5

9.80

8.00

7.70

6.24

7.39

8.26

2.13

1.41

0.27

0.126

0.265

0.230

2.52

0.62

0.00

22.6

6.4

0.0

6

semi-dry

0.5

10.10

8.20

8.32

6.29

8.65

9.212

3.35

1.95

1.44

0.056

0.346

0.219

2.50

0.86

0.40

20.5

7.4

3.6

7

wet

0.9

9.55

8.03

88.05

5.45

8.49

8.22

5.34

2.99

2.47

0.112

0.271

0.63

1.05

0.00

0.00

8.0

0.0

0.0

8 semi-dry 1.5 10.3510.059.90 5.20 8.23 8.75 3.61 2.32 2.28 0.014 0.226 0.232 1.49 0.06 0.17 14.5 12.2 12.9

8 semi-dry 1.5 10.3510.059.90 5.20 8.23 8.75 3.61 2.32 2.28 0.014 0.226 0.232 1.49 0.06 0.17 14.5 12.2 12.9

running costs, to alkali soil have the same amelioration effect on such soils as the byproduct from the wet lime slurry used in developed countries. However, application to alkali soils of more byproduct than 0.5 wt % from the semi-dry process has a deteriorating effect on amelioration, due to the persistent increased pH of the soil.

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