Table 8.

Correlation between fiber fractions in diets and fecal short-chain fatty acid concentrations in experiment 1

Item1	Acetic acid	Propionic acid	Butyric acid	Total SCFAs	FF	TDF	SDF	IDF	NDF	ADF	NSP
Acetic acid	1.00
Propionic acid	0.87**	1.00
Butyric acid	0.64	0.51	1.00
Total SCFA	0.96**	0.93**	0.73*	1.00
FF	0.94**	0.88**	0.79*	0.98**	1.00
TDF	0.91**	0.91**	0.57	0.92**	0.89**	1.00
SDF	0.56	0.46	0.81*	0.64	0.71*	0.43	1.00
IDF	0.72*	0.72*	0.19	0.65	0.61	0.87**	-0.01	1.00
NDF	0.48	0.62	-0.09	0.42	0.38	0.67	0.01	0.80*	1.00
ADF	0.73*	0.75*	0.07	0.69	0.63	0.68	0.06	0.69	0.50	1.00
NSP	0.87**	0.89**	0.48	0.87**	0.85**	0.99**	0.41	0.89**	0.76*	0.68	1.00

¹Short-chain fatty acid concentrations were expressed as mg/g and fiber fractions concentrations were expressed as %. SCFA, short-chain fatty acid; FF, fermentable fiber; TDF, total dietary fiber; SDF, soluble dietary fiber; IDF, insoluble dietary fiber; NDF, neutral detergent fiber; ADF, acid detergent fiber; NSP, non-starch polysaccharides.

*, ** Represent P < 0.05 and P < 0.01, respectively, LSMEANS based on 6 replicates of 6 pigs per dietary treatment.