Table 4 Effects of supplementation with protein in different sites on the resident mass of fiber in the rumen, the fractional rates of NDF rumen dynamics, and on the characteristics of ruminal fermentation in cattle fed tropical forage

 NDF, g/kg BW

10.7

10.0

11.8

9.6

1.3

0.337

 iNDF, g/kg BW

8.4

8.0

9.2

8.3

1.0

0.821

 ki, /h

0.060

0.071

0.052

0.063

0.008

0.238

 kp, /h

0.029

0.034

0.023

0.030

0.003

0.149

 kd, /h

0.030

0.037

0.029

0.034

0.005

0.338

 RAN, mg/dL

4.15^b

13.66^a

5.56^b

8.22^ab

1.91

0.078

 pH

6.83

6.75

6.79

6.72

0.12

0.914

 VFA, mmol/dL

5.321

5.396

5.731

5.940

0.279

0.256

 Acetate, mol/mol

73.71

73.40

75.25

74.06

0.87

0.489

 Propionate, mol/mol

18.76

19.08

17.74

19.32

0.79

0.559

 Butyrate, mol/mol

7.53

7.53

7.01

6.69

0.32

0.230

 A:P

3.96

3.86

4.29

3.84

0.22

0.501