Table 10.

Effects of feeding diets with different fermentable fiber to total dietary fiber ratio on fecal short-chain fatty acid concentrations (mg/g) in experiment 2

	FF to TDF ratio, FF/TDF						P-value
Item1	0.52	0.55	0.58	0.61	0.64	SEM	Treatment	Linear	Quadratic
Acetic acid	4.78b	4.93b	5.01b	5.14b	5.77a	0.18	<0.01	<0.01	0.16
Propionic acid	2.29	2.03	2.10	2.33	2.57	0.20	0.33	0.17	0.12
Butyric acid	1.50	1.40	1.25	1.35	1.74	0.22	0.62	0.40	0.20
Isobutyrate	0.15	0.09	0.13	0.19	0.18	0.03	0.15	0.09	0.27
Valerate	0.31	0.22	0.19	0.41	0.45	0.07	0.16	0.44	0.41
Isovalerate	0.18	0.19	0.11	0.21	0.21	0.03	0.15	0.18	0.11
Total SCFA	9.21	8.86	8.79	9.62	10.92	0.52	0.06	0.02	0.10

¹FF, fermentable fiber; TDF, total dietary fiber; SCFA, short chain fatty acid.

^a,bMeans within a row without a common superscript letter differ (P < 0.05), LSMEANS based on six replicates of six pigs per dietary treatment.