Table 6.

Lipid-class content¹ along the gastrointestinal tract and excreta according to different fat sources in the diet in 37-day-old broiler chickens.²

	Dietary treatments3								Fat4		FFA%5					P values
	Unsaturated – S diets				Saturated – P diets
Item	S5	S15	S35	S50	P5	P15	P35	P50	S	P	5	15	35	50	SEM	Fat	FFA	Interaction
Jejunum
TAG	0.74	0.89	0.91	1.00	0.40	0.39	0.40	0.37	0.88	0.39	0.57	0.64	0.65	0.68	0.027	***	NS	NS
DAG	1.02ab	1.33ab	0.94ab	1.55a	0.96ab	1.14ab	1.20ab	0.88b	1.21	1.05	0.99	1.24	1.07	1.21	0.048	NS	NS	*
MAG	0.60ab	0.76ab	0.71ab	0.88a	0.66ab	0.56ab	0.69ab	0.45b	0.74	0.58	0.62	0.66	0.70	0.66	0.027	**	NS	*
FFA	3.33	4.42	3.78	4.31	5.18	6.52	6.49	4.88	3.96	5.77	4.26b	5.47a	5.13ab	4.6ab	0.153	***	*	NS
Ileum
TAG	0.30b	0.38ab	0.53a	0.53a	0.30b	0.33b	0.28b	0.30b	0.44	0.30	0.30	0.36	0.41	0.41	0.013	***	*	**
DAG	0.45b	0.58b	0.71ab	0.90a	0.58b	0.57b	0.55b	0.51b	0.66	0.55	0.52	0.57	0.63	0.7	0.022	*	*	***
MAG	0.65	0.72	0.73	0.75	0.73	0.66	0.75	0.67	0.71	0.71	0.69	0.69	0.74	0.71	0.030	NS	NS	NS
FFA	1.27d	1.36d	1.56d	1.91d	2.88c	4.17a	3.70ab	3.27bc	1.52	3.51	2.07	2.76	2.63	2.59	0.061	***	**	***
Excreta
TAG	0.31	0.44	0.48	0.49	0.43	0.40	0.36	0.40	0.43	0.40	0.37	0.42	0.42	0.44	0.019	NS	NS	NS
DAG	0.61b	0.88ab	1.10a	0.89ab	0.66b	0.87ab	0.74ab	0.67b	0.87	0.74	0.64	0.89	0.93	0.78	0.028	*	**	*
MAG	0.40bc	0.61ab	0.49abc	0.52abc	0.40bc	0.37c	0.41bc	0.63a	0.51	0.45	0.40	0.49	0.45	0.58	0.016	NS	**	**
FFA	3.13	4.19	4.18	4.30	4.48	5.40	6.40	7.20	3.95	5.87	3.8b	4.80a	5.29a	5.75a	0.129	***	***	NS

Abbreviations: DAG, diacylglycerols; FFA, free fatty acids; MAG, monoacylglycerols; TAG, triacylglycerols.

P-values were obtained from the univariate GLM procedure of SPSS conducted to study whether the dietary treatments, the dietary fat saturation degree and the dietary FFA percentage affected the lipid-class content.

P < 0.05 was considered significant.

*P < 0.05; **P < 0.01; ***P < 0.001.

^a-dmeans in a row not sharing a common superscript letter are significantly different (P < 0.05).

¹Lipid-class concentration (mg/g) / Ti concentration (mg/g) in each gastrointestinal segment and excreta.

²Diets supplemented with 6% of an unsaturated (S) or saturated fat source (P): S5 - 100% crude soybean oil, S15 - oil blend with 70% crude soybean oil and 30% acid soybean oil from chemical refining (SA), S35 - oil blend with 30% crude soybean oil and 70% SA, S50 - 100% SA, P5 - 100% crude palm oil, P15 - oil blend with 80% crude palm oil and 20% palm fatty acid distillate from physical refining (PA), S35 - oil blend with 53% crude palm oil and 47% PA, S50 - oil blend with 33% crude palm oil and 66% PA.

³Values are means of 6 cages with 3 chickens/cage.

⁴Values are means of 24 cages with 3 chickens/cage.

⁵Values are means of 12 cages with 3 chickens/cage.