Table 6.

Apparent ileal amino acid digestibility values and digestible amino acid concentrations for spray-dried animal plasma and soybean meal determined at d 10 and d 21 of age in Experiment 4 (%, DM basis).

Amino acid	d 10 of age1				d 21 of age2				SEM4	Digestibility value probability, P4
	SDAP		SBM		SDAP		SBM
	Digest. value	Digest. conc.3	Digest. value	Digest. conc.3	Digest. value	Digest. conc.3	Digest. value	Digest. conc.3		Ingred.	Age	Ingred. × age
Met	92	0.94	84	0.67	95	0.98	89	0.71	1.1	<0.0001	0.0003	0.4214
Cys	95a	2.78	63c	0.50	94a	2.76	70b	0.55	0.9	<0.0001	0.0026	0.0003
Lys	95	7.22	82	2.74	96	7.34	87	2.90	0.9	<0.0001	0.0013	0.0654
Thr	92a	5.12	74c	1.54	93a	5.15	79b	1.64	0.7	<0.0001	0.0013	0.0074
Val	94a	5.59	80c	2.03	94a	5.61	83b	2.11	0.7	<0.0001	0.0100	0.0338
Arg	95	4.68	89	3.27	97	4.79	92	3.35	0.7	<0.0001	0.0025	0.9676
Ile	91	2.47	82	2.15	94	2.54	86	2.23	0.8	<0.0001	0.0025	0.7452
Asp	93	8.03	81	4.80	94	8.05	83	4.94	0.6	<0.0001	0.0524	0.1048
Ser	94a	4.88	79c	1.79	93a	4.85	82b	1.86	0.7	<0.0001	0.0475	0.0114
Glu	94	11.19	88	8.21	96	11.37	89	8.40	0.6	<0.0001	0.0072	0.7110
Pro	93	4.21	83	2.10	94	4.23	85	2.15	0.5	<0.0001	0.0297	0.1189
Ala	94	3.85	81	1.85	95	3.92	85	1.94	0.8	<0.0001	0.0010	0.1409
Leu	95	7.61	83	3.32	96	7.70	86	3.43	0.7	<0.0001	0.0060	0.2290
Tyr	95a	4.05	83c	1.43	96a	4.08	86b	1.48	0.6	<0.0001	0.0026	0.0433
Phe	94	4.24	84	2.24	95	4.28	87	2.31	0.6	<0.0001	0.0104	0.2741
His	95	2.45	85	1.16	96	2.48	87	1.20	0.6	<0.0001	0.0048	0.1690
Trp	96a	1.63	85c	0.65	96a	1.64	89b	0.68	0.6	<0.0001	0.0012	0.0082
Mean	94		82		95		85

^a-cDigestibility values within the same row with no common superscripts differ (P < 0.05).

¹Apparent digestibility values at d 10 of age for spray-dried animal plasma (SDAP) and soybean meal (SBM) are means of 6 replicates; each replicate consists of a pooled sample from 2 pens of 7 chicks per pen.

²Apparent digestibility values at d 21 of age are means of 6 replicate pens of 5 chicks per pen.

³Digestible concentrations = (total (Table 4) AA concentration × apparent digestibility value)/100.

⁴SEM and probability values for apparent digestibility values; analyzed as a 2 × 2 factorial arrangement of treatments, with 2 ingredients and 2 ages.