Table 5. Effects of arginine and methionine supplementation on apparent ileal digestibility of amino acids in weaning pigs under heat stress condition

Items (%)	CON	Arginine (Arg)		Methionine (Met)		SE	p-value	p-value of contrast
		0.2	0.4	0.2	0.4			Arg vs. Met	0.2 vs. 0.4
Indispensable amino acid
Arginine	86.8	86.2	86.4	86.3	86.2	1.2	0.713	0.816	0.748
Histidine	81.9	81.9	81.3	81.7	81.4	1.5	0.612	0.554	0.486
Isoleucine	77.3	77.8	77.7	77.8	77.5	1.4	0.804	0.879	0.810
Leucine	81.7	81.4	81.6	81.4	81.5	1.8	0.696	0.801	0.733
Lysine	80.9	80.0	80.4	80.6	80.3	1.9	0.787	0.317	0.249
Phenylalanine	80.3	80.3	80.4	80.3	80.3	0.9	0.682	0.863	0.795
Threonine	69.8	70.1	70.3	70.7	70.4	1.1	0.480	0.308	0.608
Methionine	83.9	82.6	83.8	81.9	82.3	1.2	0.024	0.039	0.592
Tryptophan	80.4	80.3	80.1	82.1	81.7	2.0	0.771	0.793	0.725
Valine	74.4	75.0	75.3	74.9	75.1	2.1	0.088	0.382	0.132
Dispensable amino acid
Alanine	73.5	73.1	73.4	72.9	71.5	1.4	0.341	0.340	0.366
Aspartic acid	68.7	66.8	67.2	68.4	67.5	2.1	0.603	0.274	0.348
Cysteine	69.6	71.2	70.4	71.1	69.6	1.5	0.305	0.248	0.194
Glutamic acid	81.5	82.0	81.7	80.9	81.8	2.4	0.891	0.880	0.731
Glycine	62.1	63.1	62.4	62.3	62.8	1.7	0.172	0.244	0.185
Proline	68.6	67.7	68	68.8	67.9	2.0	0.573	0.765	0.780
Serine	70.7	71.2	70.8	70.1	71.6	1.9	0.762	0.309	0.518
Tyrosine	75.6	76.5	76.9	75.2	75.2	1.5	0.851	0.297	0.648

SE, standard error.