Table 3.

In vitro kinetics of the cumulative gas production with the pea flours (first gas test trial)

	Cumulative gas production (mL 200 mg−1 DM)					P-value
Incubation time (h)	PCF	GPCF	PFF	GPFF	SEM	F	G	F × G	Run
1	2.6a	4.8b	4.6b	4.9b	0.15	<0.001	<0.001	<0.001	0.017
2	5.6a	9.2b	9.1b	9.4b	0.27	<0.001	<0.001	<0.001	<0.001
4	10.6a	18.5b	17.9b	18.5b	0.38	<0.001	<0.001	<0.001	<0.001
6	15.6a	33.2b	32.1b	33.0b	0.61	<0.001	<0.001	<0.001	<0.001
8	20.9a	48.0b	49.1b	49.7b	0.93	<0.001	<0.001	<0.001	0.007
12	35.4a	60.3b	63.4b	62.9b	1.51	<0.001	<0.001	<0.001	0.73
24	75.2a	71.3a	74.8a	74.1a	1.42	0.40	0.13	0.25	0.23
32	82.2a	75.8b	79.0a,b	78.9a,b	1.48	0.97	0.04	0.05	0.12
48	87.7a	79.5b	83.2b	82.8b	1.52	0.69	0.01	0.02	0.04

	Kinetic fitting parameters				RSE
a	89.2a	75.6b	79.3b	78.8b	1.69	0.17	0.03	0.03
c	0.123a	0.244b	0.243b	0.244b	0.0635	<0.001	<0.001	<0.001
l	2 h 43 mina	1 h 7 minb	1 h 20 minb	1 h 13 minb	26 min	0.11	0.05	0.07
GP16 (mL 200 mg−1 DM)	54.7a	71.1b	74.3b	74.1b	0.99	<0.001	<0.001	<0.001

Data are presented as LSMEANS ± SEM. PCF, pea coarse flour, obtained with a crushing roller with a 2.5 mm space; GPCF, PCF reground with a screen of 1 mm aperture; PFF, pea fine flour, obtained with hammer mill with a 2 mm screen; GPFF, PFF reground with a screen of 1 mm aperture; F, feed effect (coarse vs. fine); G, regrinding effect; F × G, interaction between feed and regrinding effects; RSE, residual standard error of the model; GP16, gas production after 16 h and 40 min. Mean values in the same row without a common superscript are significantly different at P < 0.05.