Items

P-value³

OAD¹

TAD

SEM²

FP

A

FP × A

Physicochemical parameters

E_h⁴, mV

−81

−115

10

0.059

<0.001

0.88

pH

6.13

6.36

0.06

0.97

0.37

0.10

Fermentation parameters

Volatile fatty acids

Total, mmol/L

73.2

69.1

3.0

0.92

<0.001

0.65

Acetic acid, mmol/L

44.9

41.9

1.7

0.79

<0.001

0.20

Propionic acid, mmol/L

21.9

21.6

1.2

0.86

<0.001

0.75

Butyric acid, mmol/L

4.2

3.6

0.2

0.16

0.003

0.84

Acetic acid, %

65.1

63.8

0.8

0.35

<0.001

0.56

Propionic acid, %

26.3

28.4

0.7

0.15

<0.001

0.87

Butyric acid, %

6.0

5.1

0.4

0.26

0.83

0.80

Ammonia nitrogen, mg/L

71.5

48.6

4.5

0.072

0.36

0.75