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Applied Biological Chemistry

Table 1 Selected properties of the BFs, TSP and BC

From: Sorption of urea hydrogen peroxide by co-pyrolysed bone meal and cow dung slowed-down phosphorus and nitrogen releases but boosted agronomic efficiency

Treatment

pH

Elemental content (%)

C/N ratio

Total P

Formic P

K

Ca

Mg

C

N

(mg g−1)

BC

9.98 ± 0.0

14.33 ± 2.6

2.71 ± 0.5

5.29 ± 0.5

150.9 ± 1.4

23.06 ± 4.5

3.25 ± 0.2

313.11 ± 8.4

5.88 ± 0.3

TSP

3.44 ± 0.0

0.21 ± 0.1

0.04 ± 0.0

5.25 ± 0.4

205.6 ± 4.2

34.93 ± 1.0

6.37 ± 0.4

167.08 ± 5.6

6.63 ± 0.0

CDBM 1-Urea

8.53 ± 0.1

35.11 ± 3.1

12.70 ± 0.1

2.76 ± 0.1

85.8 ± 2.9

10.73 ± 0.3

2.53 ± 0.3

216.10 ± 8.1

4.89 ± 0.2

CDBM 1-UHP

8.99 ± 0.0

35.09 ± 2.8

11.93 ± 0.1

2.94 ± 0.0

85.5 ± 3.5

10.72 ± 0.5

2.66 ± 0.1

216.19 ± 7.7

5.00 ± 0.5

CDBM 2-Urea

8.86 ± 0.1

27.01 ± 2.7

13.12 ± 0.2

2.06 ± 0.0

127.8 ± 1.8

16.52 ± 2.9

3.03 ± 0.5

270.81 ± 7.5

5.41 ± 0.1

CDBM 2-UHP

9.02 ± 0.1

27.04 ± 2.5

12.90 ± 0.1

2.10 ± 0.1

128.0 ± 1.7

16.60 ± 3.2

2.98 ± 0.3

270.85 ± 7.9

5.16 ± 0.1

CDTP-Urea

6.05 ± 0.1

37.21 ± 1.9

11.67 ± 0.8

3.19 ± 0.5

122.7 ± 2.0

18.64 ± 1.1

4.20 ± 0.2

180.04 ± 7.3

6.17 ± 0.5

CDTP-UHP

6.17 ± 0.1

37.16 ± 2.2

11.44 ± 0.1

3.25 ± 0.2

123.0 ± 2.3

18.65 ± 0.8

4.18 ± 0.2

180.90 ± 6.8

6.12 ± 0.0.7

  1. BC bone char, TSP triple superphosphate, CDBM 1 75% cow dung + 25% bone meal (3:1 mixture), CDBM 2 50% cow dung + 50% bone meal (1:1 mixture), CDTP 75% cow dung + 25% bone meal.
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