Table 4 Ruminal pH profile of fermentation characteristics of heifers fed a barley straw diet before and after rumen content transfers from the bison.

From: Repeated inoculation of cattle rumen with bison rumen contents alters the rumen microbiome and improves nitrogen digestibility in cattle

Item

Rumen transfers

SEM

P-value

Before

After

Ruminal pH

 Mean

6.47

6.45

0.005

<0.01

 Minimum

6.11

6.07

0.040

0.17

 Maximum

6.76

6.74

0.016

0.03

 SD of mean pH

0.14

0.14

0.007

0.88

Immediately before feeding

 pH

6.70

6.66

0.025

0.27

 Ammonia-N, mM

5.52

5.59

0.206

0.77

 Total VFA, mM

88.8

104.7

2.37

<0.01

 Acetate, mol/100 mol

74.7

72.5

0.27

<0.01

 Propionate, mol/100 mol

18.2

18.5

0.20

0.24

 Butyrate, mol/100 mol

5.50

6.68

0.150

<0.01

 Isovalerate, mol/100 mol

0.95

1.04

0.022

<0.01

 Valerate, mol/100 mol

0.38

0.48

0.018

<0.01

 Isobutyrate, mol/100 mol

0.68

0.75

0.013

<0.01

 Acetate:Propionate

4.10

3.93

0.058

0.02

6 h after feeding

 pH

6.24

6.07

0.039

<0.01

 Ammonia-N, mM

7.80

8.80

0.461

0.05

 Total VFA, mM

106.4

123.0

3.08

<0.01

 Acetate (C2), mol/100 mol

71.2

69.6

0.27

<0.01

 Propionate (C3), mol/100 mol

20.1

20.4

0.173

0.17

 Butyrate, mol/100 mol

6.81

8.02

0.124

<0.01

 Isovalerate, mol/100 mol

0.64

0.59

0.028

0.13

 Valerate, mol/100 mol

0.65

0.85

0.022

<0.01

 Isobutyrate, mol/100 mol

0.57

0.55

0.013

0.24

 Acetate:Propionate

3.55

3.42

0.042

<0.01

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