Table 4 LS means for VFA dynamics measurements as differentiated by diet along with P values for the effects of protein source, fiber source, and the interaction of protein and fiber source^a,b.

Synthesis, mmol/h

Acetate

22.3

15.7

17.8

28.4

6.9

0.73

0.50

0.18

Propionate

12.3

4.44

6.11

14.2

6.0

0.99

0.77

0.20

Butyrate

1.53

1.07

2.87

7.41

1.6

0.15

0.015

0.083

Valerate

1.82 × 10⁻⁴

1.09 × 10⁻⁵

4.10 × 10⁻⁶

6.33 × 10⁻⁵

9.63 × 10⁻⁵

0.57

0.53

0.26

Isovalerate

1.06 × 10⁻⁵

9.52 × 10⁻⁵

6.18 × 10⁻⁴

7.96 × 10⁻⁴

5.06 × 10⁻⁴

0.80

0.22

0.93

Isobutyrate

4.65 × 10⁻⁵

3.23 × 10⁻⁸

4.10 × 10⁻⁹

3.15 × 10⁻⁷

2.33 × 10⁻⁵

0.34

0.34

0.33

Absorption rate, mmol/mmol/h

Acetate

0.755

0.591

0.716

0.699

0.090

0.34

0.70

0.69

Propionate

0.763

0.629

0.762

0.725

0.077

0.29

0.54

0.53

Butyrate

0.704

0.563

0.618

0.564

0.13

0.46

0.74

0.74

Valerate

0.741

0.578

0.745

0.644

0.11

0.26

0.76

0.78

Isovalerate

0.564

0.696

0.531

0.542

0.13

0.58

0.47

0.64

Isobutyrate

0.671

0.590

0.738

0.763

0.10

0.75

0.21

0.56

Absorbed, mmol/h

Acetate

13.0

9.01

11.7

23.6

5.9

0.45

0.22

0.16

Propionate

9.33

4.27

6.47

12.6

4.1

0.90

0.52

0.20

Butyrate

3.11

3.65

4.27

7.45

1.3

0.12

0.045

0.25

Valerate

0.948

0.525

0.915

1.21

0.31

0.77

0.19

0.16

Isovalerate

0.229

0.506

0.564

0.643

0.20

0.34

0.22

0.59

Isobutyrate

0.387

0.324

0.429

0.785

0.21

0.39

0.16

0.23

Passage with fluid, mmol/h

Acetate

4.31

2.24

1.14

1.53

2.2

0.69

0.36

0.56

Propionate

3.42

1.19

0.623

0.806

1.7

0.53

0.34

0.47

Butyrate

1.00

0.970

0.500

1.17

0.76

0.62

0.82

0.59

Valerate

0.338

0.180

0.0976

0.124

0.18

0.69

0.38

0.58

Isovalerate

0.112

0.103

0.0988

0.0800

0.083

0.84

0.80

0.94

Isobutyrate

0.117

0.0993

0.0401

0.0402

0.067

0.90

0.31

0.89