Table 6 The absorption of FTIR spectroscopy of main wave number at the sampling stage of different manures.

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

Wave number (cm−1)

Sample time

Absorption degree (%)

0 week

3th week

6th week

9th week

Chicken manure

1450

22.35

19.32

18.15

17.16

1600

19.11

17.23

15.33

13.51

3050

12.33

12.02

11.21

10.27

Cattle manure

1400

12.08

11.08

10.31

9.05

1650

17.56

16.33

16.12

14.05

3000

15.41

14.33

13.28

11.36

Pig manure

1380

14.71

13.56

13.15

12.22

1580

20.35

18.78

18.25

16.06

2930

19.47

16.58

15.33

14.19

Soybean manure

1350

12.89

11.65

11.33

10.56

1480

15.15

14.36

13.52

11.79

2900

9.88

9.05

9.01

8.85

Lemon peel compost

1320

12.21

11.55

11.08

9.98

1460

14.25

13.21

12.33

11.95

2950

12.03

11.35

10.12

9.08

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