Microbial N

Microbial C/Microbial N

Mineral N

Sampling

Periods

Centro

Calopo

Pueraria

Centro

Calopo

Pueraria

Centro

Calopo

Pueraria

Soil Materials

(mg N kg−1 soil)

(mg N kg−1 soil)

3 Weeks

Uncontaminated soil

16.6 ± 2.2a

15.8 ± 2.5

13.6 ± 0.7

7.2 ± 0.4

14.5 ± 1.2

16.4 ± 1.5

186 ± 7.5

174 ± 3.4

134 ± 6.4

Oil-contaminated soil

39.8 ± 3.2

39.1 ± 2.4

38.3 ± 0.2

20.8 ± 0.8

16.6 ± 1.8

12.7 ± 2.2

6 ± 2.4

3.8 ± 1.8

4.2 ± 1.6

Poultry manure-treated soil

29.7 ± 2.8

28.2 ± 3.5

18.2 ± 0.6

86.4 ± 2.6

75.2 ± 1.6

42.7 ± 2.1

168 ± 2.8

156 ± 3.5

131 ± 7.6

NPK-treated soil

18.2 ± 2.5

16.4 ± 0.7

12.5 ± 0.4

38.8 ± 1.2

30.6 ± 1.5

36.7 ± 2.3

134 ± 2.8

122 ± 2.4

118 ± 3.6

6 Weeks

Uncontaminated soil

7.2 ± 0.6

7.4 ± 0.8

7.8 ± 0.6

6.5 ± 2.3

24.5 ± 1.6

28.4 ± 0.9

156 ± 6.4

142 ± 5.4

24 ± 2.1

Oil-contaminated soil

38.2 ± 0.8

32.7 ± 0.2

26.2 ± 0.4

18.5 ± 0.5

15.3 ± 0.7

10.5 ± 0.4

4.2 ± 0.5

3.2 ± 0.6

2.2 ± 1.2

Poultry manure-treated soil

16.2 ± 1.4

14.6 ± o.8

11.2 ± o.8

86.4 ± 2.5

80.2 ± 2.2

68.4 ± 2.9

178 ± 8.5

156 ± 2.8

79 ± 3.4

NPK-treated soil

12.5 ± 0.4

10.4 ± 0.5

8.9 ± 1.2

84.6 ± 1.7

78.3 ± 2.8

32.1 ± 1.1

158 ± 4.5

137 ± 3.5

48 ± 1.5

9 Weeks

Uncontaminated soil

9.8 ± 0.7

6.6 ± 0.8

3.6 ± 0.4

4.6 ± 0.8

15.6 ± 2.1

19.4 ± 1.2

82 ± 1.8

66 ± 2.8

50 ± 0.7

Oil-contaminated soil

28.6 ± 2.8

28.0 ± 2.1

28.5 ± 3.4

14.7 ± 0.6

12.2 ± 0.9

8.3 ± 0.7

6.2 ± 0.2

5.4 ± 1.8

4.1 ± 0.4

Poultry manure-treated soil

16.5 ± 2.6

10.9 ± 0.7

9.8 ± 1.4

68.2 ± 4.2

76.5 ± 2.6

92.7 ± 1.4

182 ± 5.6

174 ± 6.8

13 ± 1.4

NPK-treated soil

15.4 ± 1.5

12.2 ± 1.2

4.8 ± 1.5

28.5 ± 2.8

22.3 ± 1.2

29.6 ± 0.8

162 ± 2.6

156 ± 3.4

7.5 ± 2.6

12 Weeks

Uncontaminated soil

5.2 ± 0.4

6.4 ± 0.8

7.6 ± 1.5

14.9 ± 2.1

10.6 ± 0.3

12.4 ± 0.6

16.5 ± 0.6

14.5 ± 0.8

11.1 ± 0.4

Oil-contaminated soil

30.6 ± 2.1

29.2 ± 0.2

28.6 ± 2.4

34.2 ± 2.8

30.6 ± 1.3

32.8 ± 1.6

2 ± 0.8

2 ± 0.4

2 ± 0.6

Poultry manure-treated soil

14.8 ± 1.2

14.3 ± 0.7

12.2 ± 2.6

98.6 ± 7.7

74.8 ± 2.8

56.4 ± 2.4

122 ± 3.4

110 ± 5.6

2.4 ± 0.3

NPK-treated soil

12.2 ± 1.4

10.8 ± 0.4

10.2 ± 0.7

50.4 ± 2.6

34.8 ± 1.6

26.7 ± 1.3

104 ± 0.9

101 ± 0.2

2.2 ± 0.5