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Table 4 Mineral content of both the leaf lettuce and Japanese hogfennel affected by the varying rates of organic amendments

From: Yield, functional properties and nutritional compositions of leafy vegetables with dehydrated food waste and spent coffee grounds

Crops

Treatments

Na

Mg

K

Ca

P

Fe

Zn

Mn

(mg/100 g)

Leaf lettuce

Control

54.28 ± 2.10D

57.26 ± 2.34D

309.10 ± 7.71C

96.58 ± 4.31C

40.53 ± 2.92D

8.24 ± 1.24CD

0.48 ± 0.02C

0.78 ± 0.03E

N

59.10 ± 1.67D

72.22 ± 1.74C

340.89 ± 4.65B

105.60 ± 4.65B

62.99 ± 2.90C

7.61 ± 0.57D

0.73 ± 0.11A

1.22 ± 0.19C

SCGs0.5

11.23 ± 0.84F

15.95 ± 1.62G

141.95 ± 3.64F

108.68 ± 8.85B

22.27 ± 0.55F

7.51 ± 0.06CD

0.03 ± 0.00F

0.49 ± 0.01G

SCGs1.0

10.21 ± 1.22F

14.15 ± 1.09G

198.61 ± 3.60EF

59.37 ± 1.17D

18.05 ± 2.75E

9.07 ± 1.55CD

0.03 ± 0.01F

0.30 ± 0.11H

SCGs2.0

20.93 ± 2.60E

32.96 ± 3.87F

291.55 ± 4.79C

52.45 ± 4.93D

42.62 ± 2.86D

8.15 ± 1.15CD

0.26 ± 0.04E

2.31 ± 0.48B

DFWP0.5

82.25 ± 1.02C

40.84 ± 2.90E

255.07 ± 6.67D

147.14 ± 6.95A

59.69 ± 5.39C

15.43 ± 1.71A

0.74 ± 0.09A

6.48 ± 0.10A

DFWP1.0

190.91 ± 2.03B

86.22 ± 3.54B

607.03 ± 9.04A

147.74 ± 4.08A

77.45 ± 2.18A

10.26 ± 1.36B

0.64 ± 0.13B

0.65 ± 0.09F

DFWP2.0

267.71 ± 1.20A

124.20 ± 5.49A

150.93 ± 1.44EF

148.57 ± 2.71A

65.74 ± 3.77B

10.76 ± 1.29B

0.38 ± 0.04D

1.04 ± 0.10D

p-value

***

**

**

**

*

**

***

**

Japanese hogfennel

Control

22.91 ± 1.22e

62.58 ± 2.23f

62.20 ± 3.20e

88.84 ± 3.21f

19.71 ± 1.02e

88.35 ± 2.11g

0.35 ± 0.05f

4.97 ± 0.33g

N

25.49 ± 1.23cd

86.71 ± 2.22e

82.15 ± 3.19d

90.82 ± 3.15f

19.84 ± 1.02e

161.63 ± 4.12f

0.55 ± 0.05e

7.08 ± 0.93f

SCGs0.5

28.96 ± 0.45cd

98.62 ± 2.68d

83.24 ± 5.18d

98.60 ± 3.42e

24.24 ± 2.67d

219.14 ± 1.62d

0.71 ± 0.08c

9.18 ± 0.68d

SCGs1.0

29.85 ± 0.54cd

108.06 ± 7.07c

84.06 ± 0.50d

134.36 ± 6.59d

27.63 ± 1.91c

254.07 ± 7.00c

0.72 ± 0.00c

9.24 ± 1.71d

SCGs2.0

28.36 ± 0.39d

98.32 ± 6.60d

82.71 ± 5.25d

98.51 ± 3.73e

24.06 ± 1.67d

204.72 ± 3.26e

0.59 ± 0.05d

7.88 ± 0.47e

DFWP0.5

37.22 ± 2.37b

116.77 ± 5.86b

105.60 ± 4.27b

150.10 ± 5.47b

29.44 ± 3.76b

278.87 ± 2.67b

0.78 ± 0.03b

10.30 ± 1.44b

DFWP1.0

44.40 ± 4.05a

132.93 ± 6.10a

114.04 ± 3.24a

165.77 ± 7.17a

32.33 ± 2.01a

351.88 ± 11.01a

1.07 ± 0.19a

11.23 ± 0.81a

DFWP2.0

31.25 ± 2.73c

116.56 ± 5.92b

94.14 ± 1.41c

138.73 ± 5.48c

29.18 ± 1.73b

278.85 ± 7.30b

0.77 ± 0.13b

9.79 ± 0.94c

p-value

*

**

***

**

*

*

**

***

  1. Control, Untreated treatment; N, Treatment with inorganic fertilizers; SCGsx.x, Treatment applied at half the recommeded rate (0.5), the recommeded rate (1.0), and double the recommeded rate (2.0) of spent coffee grounds; DFWPx.x, Treatment applied at half the recommeded rate (0.5), the recommeded rate (1.0), and double the recommeded rate (2.0) of dehydrated food waste powder. Within each column, values follwed by the same letters are not significant difference at p < 0.05
  2. *, **, and *** are used to indicate statistically significant differences at the p < 0.05, p < 0.01, and p < 0.001, respectively