Table 1 The properties of swine manure and biochar.

From: Influence of potassium addition on phosphorus availability and heavy metals immobility of biochar derived from swine manure

 

Yield (%)

pH

C (%)

N (%)

H (%)

O (%)

H/C

Crentation (%)

Total P (g/kg)

Total Ca

(g/kg)

Exchangeable Ca (g/kg)

Total Mg (g/kg)

Exchangeable Mg (g/kg)

Total K (g/kg)

Available K (g/kg)

SM

–

7.58 ± 

0.05a

39.09 ± 

0.12c

3.32 ± 

0.02d

3.24 ± 

0.03c

28.99 ± 

0.19d

0.99 ± 

0.03c

-

18.33 ± 

0.12a

54.65 ± 

0.69a

18.96 ± 

0.23a

15.04 ± 

0.51a

8.47 ± 

0.10a

19.83 ± 

0.16a

7.23 ± 

0.08a

SMB

34.19 ± 

0.15a

10.87 ± 

0.06b

35.88 ± 

0.21c

2.22 ± 

0.03c

1.28 ± 

0.01b

9.10 ± 

0.05c

0.43 ± 

0.02b

31.39 ± 

0.42a

48.80 ± 

0.21c

153.32 ± 

1.24c

16.80 ± 

0.17a

42.74 ± 

0.32c

8.83 ± 

0.09a

62.55 ± 

0.41b

17.78 ± 

0.16b

SMBK1

38.91 ± 

0.18c

11.17 ± 

0.04bc

30.62 ± 

0.14ab

1.75 ± 

0.02b

0.95 ± 

0.01ab

8.68 ± 

0.06bc

0.37 ± 

0.01a

33.43 ± 

0.37b

44.48 ± 

0.19b

141.43 ± 

2.33b

29.35 ± 

0.78b

38.65 ± 

0.26b

11.89 ± 

0.14b

163.60 ± 

0.99c

73.56 ± 

0.25c

SMBK2

39.35 ± 

0.11c

11.24 ± 

0.06bc

28.69 ± 

0.11a

1.59 ± 

0.03a

0.93 ± 

0.02ab

7.87 ± 

0.07ab

0.39 ± 

0.00ab

31.43 ± 

0.20a

43.81 ± 

0.30b

139.80 ± 

1.78b

31.01 ± 

0.47b

38.22 ± 

0.27b

11.61 ± 

0.20b

162.03 ± 

1.42c

87.23 ± 

0.31d

SMBK3

37.63 ± 

0.24b

11.62 ± 

0.05c

31.10 ± 

0.13b

1.73 ± 

0.02b

0.92 ± 

0.00a

6.83 ± 

0.05a

0.35 ± 

0.01a

34.05 ± 

0.36b

44.38 ± 

0.27b

145.76 ± 

2.01bc

34.66 ± 

0.33b

41.06 ± 

0.30bc

12.86 ± 

0.25c

171.17 ± 

2.04c

75.87 ± 

0.56c

SMBK4

38.01 ± 

0.31bc

11.56 ± 

0.03c

31.34 ± 

0.17b

1.75 ± 

0.01b

0.91 ± 

0.02a

8.04 ± 

0.03b

0.35 ± 

0.01a

35.04 ± 

0.40b

42.71 ± 

0.18b

142.98 ± 

1.96b

35.07 ± 

0.13b

39.57 ± 

0.15b

13.61 ± 

0.17c

164.32 ± 

2.41c

78.23 ± 

0.60c

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