Table 3. Treatments’ effects on postruminal digestion of FA of Holstein steers (208 kg LW).

Item	C18:1 infusion, gm/day			SEM	Contrast p-value
	0	67	165		L	Q
FA intake	370	443	547	--	--	--
Flow to duodenum, gm/day
TFA	400	478	595	28.9	0.04	0.99
C14:0	16.5	16.6	16.2	0.12	0.31	0.35
C16:0	124	143	145	12.3	0.39	0.55
C18:0	192	192	225	9.96	0.13	0.39
C18:1	49	103	180	5.08	<0.01	0.80
C18:2	18.5	23.3	29.3	2.31	0.08	0.90
Saturated FAs	333	352	387	22.3	0.22	0.94
Unsaturated FAs	68	126	209	6.30	<0.01	0.80
Unsaturated: saturated FA ratio	0.20	0.36	0.54	0.03	<0.01	0.03
Fecal excretion, gm/day
TFA	108	88	173	19.7	0.12	0.19
C14:0	1.42	3.46	2.52	0.89	0.55	0.28
C16:0	30.0	26.9	41.8	15.2	0.61	0.72
C18:0	70.3	43.9	112.6	4.0	0.01	<0.01
C18:1	4.87	10.9	14.4	4.45	0.28	0.72
C18:2	1.35	1.89	1.95	0.43	0.45	0.63
Saturated FAs	102	74	157	15.64	0.10	0.12
Unsaturated FAs	6.23	12.8	16.3	4.66	0.27	0.70
Unsaturated: saturated FA ratio	0.06	0.17	0.10	0.07	0.14	0.27
Posruminal digestion, %
TFA	73.02	81.58	70.92	2.24	0.52	0.07
C14:0	91.40	78.76	84.52	5.91	0.56	0.30
C16:0	75.63	82.25	73.25	9.36	0.82	0.58
C18:0	63.22	77.05	49.51	2.71	0.06	0.03
C18:1	89.95	89.97	92.21	3.50	0.68	0.86
C18:2	92.64	91.21	93.11	1.61	0.80	0.50
Saturated FAs	69.31	78.96	59.81	2.33	0.08	0.04
Unsaturated FAs	90.83	89.84	92.30	3.15	0.72	0.77