Table 9.

Post-absorptive plasma AA concentrations (µmol/L) of piglets at birth, weaning, and after three and six weeks of the nursery phase ¹.

	Dietary Treatment 1								SEM 4	p-Value 5
Item	0.29				0.92
	Birth	Wean 2	3 Weeks 3	6 Weeks 3	Birth	Wean 2	3 Weeks 3	6 Weeks 3		Diet	Stage	Diet × Stage
Indispensable AA, μM 6
Arg	112.0	114.8	161	169.7	73.6	131.1	140.8	159.5	19.32	0.367	<0.001	0.455
His	53.9	78.9	64.1	61.6	98.4	85.9	62.4	66.33	20.54	0.299	0.749	0.662
Ile	54.9	120	190.5	216.4	55.9	130.2	189.4	229.2	8.81	0.389	<0.001	0.825
Leu	101.6	152.2	216.6	242.3	122.5	153.2	220.7	260.3	15.90	0.388	<0.001	0.879
Lys	174.7	146.5	161.3	208.5	186.4	142.8	161.2	224.4	15.30	0.609	<0.001	0.890
Met	18.11	50.62	45.67	51.84	31	51.6	41.75	49.98	5.19	0.619	<0.001	0.321
Phe	67.2	121.1	116.7	117.2	82.1	128.8	114.1	116.1	7.33	0.432	<0.001	0.563
Thr	85.6	103.8	161.5	166.4	92.1	114.4	150.4	181.9	11.19	0.523	<0.001	0.748
Trp	42.23	66.79	62.42	71.05	41.09	75.72	51.32	70.74	4.00	0.802	<0.001	0.187
Val	233.5	228.3	313.1	366.3	300.1	234.2	297.9	393.5	17.11	0.128	<0.001	0.099
Total	944	1183	1493	1671	1083	1248	1430	1736	88.43	0.416	<0.001	0.784
Dispensable AA, μM
Ala	741	301	312	318	668	317	275	362	38.00	0.608	<0.001	0.358
Asn	58.81	53.09	70.39	82.41	51.38	50.75	65.73	73.58	6.39	0.201	<0.001	0.952
Asp	22.26	13.39	15.78	19.74	19.54	12.95	18.04	23.26	2.74	0.744	0.005	0.624
Cys	43.22	27.73	23.05	40.12	44.49	32.24	22.65	28.72	6.36	0.725	0.017	0.564
Gln	2795	2176	3077	3425	3434	2100	2808	3552	316.00	0.658	<0.001	0.500
Glu	168.9	130.2	165.9	166.1	170.1	131.3	165.5	177.2	15.43	0.77	0.016	0.981
Gly	923	1054	754	850	1146	1028	825	866	188.00	0.63	0.445	0.929
Pro	222.7	229.1	196.6	241.3	253.7	224.4	190.8	253.9	24.77	0.748	0.201	0.799
Ser	231.3	155.7	188.1	187.9	204.8	162.4	205.8	202.8	11.61	0.648	<0.001	0.186
Tyr	79.7	111.8	98.1	130.6	119.6	127.5	91.6	129	13.93	0.482	0.023	0.163
Total 7	5412	4370	4979	5554	6226	4306	4725	5761	441	0.54	0.001	0.652

¹ Dietary treatments were as follows: 0.29% and 0.92% standardized ileal digestible sulfur AAs, which correspond to 63 or 200% of the estimated SID SAAs requirement for primiparous sows in late gestation (requirements from d 90 to d 114 of gestation, 145 kg of body weight at breeding, expected litter size of 15, and piglet birth weight of 1.35 kg). Common diets were provided in a 4-phase feeding program (Phase I: wean to d 7; Phase II: d 8 to d 21; Phase III: d 22 to d 35; Phase IV: d 36 to end of trial). ² While sows were receiving standard lactation diets for 23 ± 5 days. ³ Analysis performed to evaluate a possible carry-over effect of experimental diets containing 0.29% or 0.92% standardized ileal digestible SA fed between d 90 of gestation and farrowing on the offspring during nursery stage. ⁴ Maximum value for the standard error of the means. ⁵ p-values for the two-way ANOVA procedure between the treatments and stage (farrowing, weaning, 3rd and 6th week of nursery). ⁶ Blood samples were collected after farrowing, within 1 h post-parturition before 1st suckling, at weaning, and in post-absorptive stage, 15 h after the last meal for weeks 3 and 6 of nursery. ⁷ Cys was included in the total.