Table 4. pH of the cultured medium after 48-hour incubation, true dry matter digestibility of the samples, and kinetic parameters of gas production

Item	Treatment¹⁾						SEM	p-value
Item	Flake_32	Flake_41	Flake_48	Flake_66	Flake_86	Flake_89	SEM	Overall	Linear
pH	6.20^a	6.15^a	6.22^a	6.18^a	6.05^b	6.07^b	0.017	< 0.01	< 0.01
TDMD (%)	88.7	92.3	94.0	92.4	93.0	96.1	2.89	0.500	0.099
V_max (mL)	54.3	56.0	54.8	53.1	55.0	55.6	1.43	0.323	0.857
k_d (h⁻¹)	0.166	0.164	0.125	0.163	0.193	0.201	0.0233	0.219	0.046
Lag (h)	3.2	3.5	3.2	2.7	2.4	2.4	0.45	0.045	< 0.01

Flake_(% gelatinization).
Means that do not have common superscript differ (p < 0.05).
TDMD, true dry matter digestibility; V_max, maximum volume of gas production; k_d, fractional rate of gas production.