Table 10.

SCFA in serum of gestating gilts fed different diets^1,2,3

	NP		LP			P-value
	−DF	+DF	−DF	+DF	SEM	CP	DF	CP × DF
Day 30 of gestation
Acetate, μmol/L	275.26	235.60	225.03	251.40	37.15	0.414	0.752	0.121
Propionate, μmol/L	38.33	37.81	32.71	33.63	6.79	0.339	0.968	0.888
Butyrate, μmol/L	2.45	2.79	4.49	4.19	1.19	0.007	0.977	0.593
Isovaleric acid, μmol/L	18.63	18.71	17.43	20.31	2.74	0.920	0.465	0.490
Valeric acid, μmol/L	21.71	18.49	21.39	18.39	2.40	0.906	0.088	0.950
Total SCFAs, μmol/g	356.39	314.46	301.05	327.91	39.50	0.378	0.750	0.151
Day 90 of gestation
Acetate, μmol/L	256.01	258.88	259.91	261.05	18.98	0.812	0.876	0.947
Propionate, μmol/L	23.42	23.62	27.01	35.45	2.85	0.002	0.066	0.079
Butyrate, μmol/L	3.57	4.65	3.63	3.13	0.78	0.182	0.593	0.149
Isovaleric acid, μmol/L	22.30ab	18.38ab	17.36a	23.09b	3.03	0.955	0.655	0.021
Valeric acid, μmol/L	29.58	21.69	20.15	18.15	8.77	0.115	0.226	0.469
Total SCFAs, μmol/g	334.92	327.21	328.07	340.87	22.59	0.830	0.873	0.519

¹NP, normal CP; LP, low CP; DF, dietary fiber. DF mixture consisted of pectin, inulin, and cellulose at the ratio of 1:10:34.

² N = 12 per group.

³SCFA, the sum of acetate, propionate, butyrate, isovaleric acid, and valeric acid contents.

^a,bMeans with different superscript letters denote P < 0.05.