Table 3.

Effects of dietary treatments on free amino acid concentrations (μg/mL) in systemic plasma at 20 d post–hatch.

L-Methionine, g/kg	Arginine	Histidine	Isoleucine	Leucine	Lysine	Methionine	Phenylalanine	Threonine	Tryptophan	Valine
0	86.5	25.8a	27.3	34.8	137.3a	5.7c	25.5	144.0a	7.0	51.8
1.38	84.3	16.3b	25.5	33.7	71.2b	11.7b	26.2	99.5b	6.8	45.8
2.76	90.0	14.5b	25.8	33.3	61.0b	16.8b	26.5	93.3b	7.7	45.3
4.14	89.7	13.2b	24.2	31.2	59.3b	22.8a	25.7	95.0b	7.0	43.0
SEM	4.91	1.74	1.56	2.14	7.33	1.82	1.43	9.76	0.43	2.31
Significance (P = )	0.823	<0.001	0.566	0.679	<0.001	<0.001	0.957	0.004	0.541	0.077
Quadratic (r = )	0.492	0.777	0.279	0.261	0.879	0.841	0.118	0.683	0.154	0.516
(P = )	0.055	<0.001	0.425	0.480	<0.001	<0.001	0.859	0.001	0.778	0.039
L-Methionine, g/kg	Alanine	Asparagine	Aspartic acid	Cysteine	Glutamine	Glutamic acid	Glycine	Proline	Serine	Tyrosine
0	85.7	54.2	16.8	18.0	230.3	88.2	82.0	89.5	101.7a	27.8
1.38	93.8	48.7	12.5	19.0	193.5	89.7	71.8	77.5	76.5b	31.8
2.76	113.8	52.2	11.3	18.8	209.7	70.3	64.5	81.0	66.0b	34.8
4.14	99.7	47.7	15.0	20.2	201.5	77.8	63.7	79.5	70.7b	30.0
SEM	7.07	3.59	1.69	0.98	15.80	15.06	5.02	4.85	4.45	2.01
Significance (P = )	0.065	0.557	0.126	0.495	0.412	0.778	0.063	0.341	<0.001	0.123
Quadratic (r = )	0.472	0.214	0.492	0.307	0.281	0.167	0.548	0.336	0.811	0.473
(P = )	0.071	0.611	0.055	0.355	0.422	0.739	0.024	0.284	<0.001	0.070

^{a, b} Mean values within columns not sharing a common superscript are significantly different at the 5% level of probability.