Table 3 Effect of monensin (12 μg/ml) and cinnamon extract (1.5 mg/ml) addition on rumen fermentation products (in-vitro) over an incubation period of 24 h using hay and glucose as a substrate (Exp 2)

Lactic acid (mM)

86.8^a

45.60^c

70.67^b

3.00

< 0.001

Total VFA (mM)²

100.25^a

65.73^c

83.89^b

2.26

< 0.001

Acetate, %

68.84^b

67.84^c

70.43^a

0.3

< 0.001

Propionate, %

18.37^b

19.63^a

16.89^c

0.2

< 0.001

Butyrate, %

10.63

10.71

10.82

0.17

0.741

Acetate: Propionate

3.75^b

3.46^c

4.17^a

0.054

< 0.001