Table 5 The chemical properties of lemon peel compost at different sampling stage.

From: Preliminary design for establishing compost maturity by using the spectral characteristics of five organic fertilizers

 

pH

OM3 (%)

HA4 (%)

C/N

C (%)

N (%)

P (%)

K (%)

Ca (%)

Mg (%)

Mn (mg/kg)

Fe (mg/kg)

Cu (mg/kg)

Zn (mg/kg)

Na (mg/kg)

W02

6.4 ± 0.3a1

90.2 ± 7.1a

1.3 ± 0.40b

27.4 ± .1.8a

71.7 ± 3.3a

2.62 ± 0.6a

0.23 ± 0.09a

1.98 ± 0.58a

16,029 ± 1011c

1022 ± 423c

9 ± 3.3c

177 ± 28c

5 ± 1.5b

11 ± 2.9d

380 ± 49b

W2

6.4 ± 0.2a

86.1 ± 5.3a

1.9 ± 0.8b

25.9 ± 1.1a

70.7 ± 2.8a

2.73 ± 0.5a

0.21 ± 0.98a

2.61 ± 0.43a

14,115 ± 1988c

2674 ± 233b

13 ± 2.7c

238 ± 44b

11 ± 3.4a

26 ± 3.4c

360 ± 43b

W4

6.3 ± 0.1a

76.5 ± 7.3ab

2.3 ± 1.0ab

27.1 ± 1.0a

62.6 ± 3.1b

2.29 ± 0.7a

0.32 ± 0.09a

2.07 ± 0.50a

18,657 ± 2315c

2288 ± 356b

22 ± 3.8b

301 ± 56b

12 ± 2.8a

35 ± 4.2b

301 ± 37b

W6

6.5 ± 0.2a

66.2 ± 3.8b

3.1 ± 1.1b

21.8 ± 1.4b

63.2 ± 2.8b

2.90 ± 0.6a

0.33 ± 0.10a

2.33 ± 0.47a

25,027 ± 3023b

4524 ± 610a

31 ± 7.1b

412 ± 71b

11 ± 3.1a

36 ± 5.1b

316 ± 42b

W8

6.7 ± 0.2a

58.9 ± 4.6b

4.9 ± 0.5a

19.8 ± 1.4b

58.1 ± 3.3b

2.94 ± 0.4a

0.32 ± 0.08a

2.33 ± 0.42a

51,256 ± 4610a

5746 ± 689a

63 ± 6.5a

988 ± 55a

16 ± 3.8a

63 ± 3.8a

534 ± 39a

  1. 1Different letters indicate significantly different results by LSD tests at p < 0.05.
  2. 20, 2, 4, 6, 8 week after compost.
  3. 3Organic matter.
  4. 4Humic acid.