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Table 4 Total content of Cr in soil and plant parts in milligrams per kilogram (flax second planting season)

From: Phytoremediation of some heavy metals in contaminated soil

Treatment

Second planting season (flax)

Soil additive

Foliar spraying

Shoot

Root

Whole plant

Soil after second planting

Remediated fraction

Remediation (%)

Double season phytoremediation (%)

BCF shoot

BCF root

BCF whole plant

Sulfur

Humic acid

4.99a

8.21a

13.19a

22.85l

13.39a

36.95a

66.87a

0.218a

0.359a

0.577a

Sulfur

Gibberellin

3.16e

6.21d

9.36c

23.85k

10.16h

29.85b

65.42b

0.132b

0.260b

0.392b

Sulfur

Control

3.09f

5.60h

8.68g

28.70j

9.41k

24.69f

58.39c

0.108d

0.195d

0.302c

Compost

Humic acid

2.54i

6.55b

9.09e

32.52h

12.91b

28.42c

52.86e

0.078f

0.201c

0.280d

Compost

Gibberellin

3.08f

4.84k

7.91i

34.21f

11.41d

25.01e

50.41g

0.090e

0.141j

0.231g

Compost

Control

3.18d

3.93l

7.10l

35.50e

11.99c

25.26d

48.54h

0.090e

0.111l

0.200k

Control

Humic acid

3.46c

6.13e

9.58b

31.87i

10.13i

24.10i

53.80d

0.109d

0.192e

0.301c

Control

Gibberellin

3.98b

5.18i

9.15d

33.15g

10.69g

24.38g

51.94f

0.120c

0.156i

0.276e

Control

Control

2.80g

4.87j

7.66k

35.87c

9.67j

21.23h

48.00j

0.078f

0.136k

0.214i

Vermiculite

Humic acid

2.58h

6.33c

8.90f

35.89b

10.82f

23.16j

47.97k

0.072g

0.176f

0.248f

Vermiculite

Gibberellin

2.12j

5.89g

8.00h

35.74d

11.35e

24.10i

48.19i

0.059h

0.165g

0.224h

Vermiculite

Control

1.76k

6.00f

7.75j

37.56a

8.90l

19.16k

45.55l

0.047i

0.160h

0.206j

Mean

3.06

5.81

8.86

32.31

10.90

25.53

53.16

0.10

0.19

0.29

Minimum

1.76

3.93

7.10

22.85

8.90

19.16

45.55

0.047

0.111

0.200

Maximum

4.99

8.21

13.19

37.56

13.39

36.95

66.87

0.218

0.359

0.577

  1. Values with different letters in a column are significantly different at the 0.05 level
  2. Italics, calculated mean, minimum, and maximum