. 2023 Mar 28;13:313–323. doi: 10.1016/j.aninu.2023.03.002

Table 7.

Apparent total tract fatty acid digestibility (ATTD) coefficients according to different fat sources and dietary FFA content.

Item	C16:0	C18:0	C18:1 n-9	C18:2 n-6	C18:3 n-3	SFA	MUFA	PUFA	TFA
Experimental diet
S10	0.81	0.86	0.88	0.91	0.94	0.82	0.89	0.91	0.88
S20	0.81	0.83	0.90	0.93	0.96	0.81	0.90	0.93	0.90
S30	0.78	0.80	0.87	0.90	0.92	0.77	0.87	0.90	0.87
S45	0.79	0.78	0.90	0.95	0.94	0.78	0.90	0.95	0.91
P10	0.73	0.65	0.91	0.91	0.91	0.73	0.91	0.91	0.83
P20	0.73	0.66	0.91	0.90	0.90	0.72	0.91	0.90	0.84
P30	0.70	0.63	0.90	0.88	0.89	0.70	0.90	0.88	0.81
P45	0.69	0.64	0.90	0.89	0.90	0.69	0.90	0.89	0.81
Fat source
Soybean	0.80^b	0.82^a	0.89^b	0.92^a	0.94^a	0.79^a	0.89^b	0.92^a	0.89^a
Palm	0.71^a	0.64^b	0.91^a	0.89^b	0.90^b	0.71^b	0.91^a	0.90^b	0.82^b
FFA content
10%	0.77	0.76^a	0.90	0.91	0.92	0.77	0.90	0.91	0.86
20%	0.77	0.74^ab	0.91	0.92	0.93	0.77	0.90	0.92	0.87
30%	0.74	0.72^b	0.89	0.89	0.90	0.73	0.89	0.89	0.84
45%	0.74	0.71^c	0.90	0.92	0.92	0.73	0.90	0.92	0.86
SEM¹	0.01	0.02	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Effects, P-values
Fat source	<0.001	<0.001	<0.001	0.002	<0.001	<0.001	<0.001	0.005	<0.001
FFA content	0.064	0.033	0.059	0.109	0.230	0.057	0.061	0.163	0.091
Fat source × FFA	0.883	0.334	0.068	0.087	0.637	0.887	0.070	0.092	0.167
Linear contrast², P-values
Overall	-	0.004	-	-	-	-	-	-	-

S = soybean; P = palm; TFA = total fatty acids; SFA = saturated fatty acids; MUFA = monounsaturated fatty acids; PUFA = polyunsaturated fatty acids; FFA = free fatty acids.

^a^,^b Means within each variable with more than 2 levels (experimental diet or FFA content) not sharing a common superscript differ according to Tukey's test (P < 0.05).

Pooled standard error of the means.

Linear responses to dietary FFA content.