Fig. 3

Effect of monensin (12 μg/ml) and cinnamon extract (1.5 mg/ml) addition on cumulative gas production (KPa) from in-vitro fermentation over 24 h incubation period (3, 6, 9, 12, and 24 h) using corn (A) or barley grain (B) as substrates (Exp.3). Symbols represent means, n = 6. The p-value for the effect of time, substrate x time, and treatment x time was < 0.001, while =0.09 for the treatment effect. The p-value for substrate effect was 0.56, substrate x treatment =0.39, and substrate x treatments x time = 0.08. SEM: standard error of the mean 4.87