Table 6. Apparent ileal digestibility (%) of amino acids in the corn- or soybean meal-based dietfed to 10-d-old and 22-d-old broiler chickens¹⁾

Item	Corn		SBM		SEM	p-values
	d 10	d 22	d 10	d 22		Age	Ingredient	Age × Ingredient
Indispensable AA
Arg	79.6	87.0	88.0	92.2	0.55	< 0.01	< 0.01	0.007
His	76.2	86.1	83.3	88.1	0.80	< 0.01	< 0.01	0.004
Ile	68.0	81.9	82.7	88.0	0.86	< 0.01	< 0.01	<0.01
Leu	79.7	89.9	83.6	88.4	0.63	< 0.01	0.072	<0.01
Lys	66.0	76.0	84.4	88.1	0.98	< 0.01	< 0.01	0.003
Met	80.5	87.9	85.9	91.6	0.60	< 0.01	< 0.01	0.167
Phe	74.9	85.7	83.7	88.2	0.73	< 0.01	< 0.01	0.000
Thr	49.4	68.2	73.5	81.2	1.39	< 0.01	< 0.01	0.001
Val	72.8	76.9	82.6	83.7	1.01	0.016	< 0.01	0.134
Dispensable AA
Ala	76.5	87.3	81.3	86.4	0.79	< 0.01	0.020	0.001
Asp	65.8	77.9	77.7	83.9	1.00	< 0.01	< 0.01	0.007
Cys	65.0	78.7	62.9	76.9	1.18	< 0.01	0.113	0.941
Glu	80.6	89.7	85.4	89.8	0.60	< 0.01	< 0.01	0.001
Gly	62.0	73.7	74.9	81.4	1.15	< 0.01	<0.01	0.030
Pro	75.7	84.5	80.2	85.2	0.78	< 0.01	0.002	0.021
Ser	64.5	77.5	77.5	85.2	1.06	< 0.01	< 0.01	0.020
Tyr	74.3	80.8	83.2	88.1	0.82	< 0.01	< 0.01	0.337

Data are least squares means of eight observations per treatment.
SBM, soybean meal; AA, amino acids; Arg, arginine; His, histidine; Ile, isoleucine; Leu, leucine; Lys, lysine; Met, methionine; Phe, phenylalanine; Thr, threonine; Val, valine; Ala, alanine; Asp, aspartic acid; Cys, cysteine; Glu, glutamic acid; Gly, glycine; Pro, proline; Ser, serine; Tyr, tyrosine.