. 2021 Nov 30;100(1):skab351. doi: 10.1093/jas/skab351

Table 5.

Apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of crude protein and amino acids (AA) in experimental diets (Exp. 1)¹,²

Item, %	AID			SEM	P-value	SID³			SEM	P-value
	Basal	SDPP 1	SDPP 2			Basal	SDPP 1	SDPP 2
Crude protein	81.8^b	83.5^b	86.2^a	3.3	0.028	94.8^a	91.1^b	94.3^a	3.3	0.017
Indispensable AA
Arg	91.5^b	91.2^b	94.6^a	1.5	0.006	99.2^a	95.8^b	98.9^a	1.5	0.003
His	87.9^b	88.5^b	92.2^a	2.1	0.002	94.7^a	92.1^b	95.7^a	2.1	0.002
Ile	88.6^b	87.4^b	91.6^a	2.2	0.001	95.0^a	91.7^b	95.7^a	2.2	0.001
Leu	89.9^b	89.1^b	93.2^a	1.9	0.001	95.2^a	92.2^b	96.2^a	1.9	0.001
Lys	87.2^b	88.1^b	91.5^a	2.3	0.006	94.8^a	91.8^b	95.2^a	2.3	0.006
Met	91.5^a	89.0^b	90.9^a	2.0	0.018	97.1^a	94.0^b	95.9^a	2.0	0.007
Phe	88.5^b	88.7^b	92.7^a	2.1	0.002	94.8^a	92.2^b	96.1^a	2.1	0.001
Thr	83.2^b	83.6^b	88.7^a	3.1	0.004	95.6^a	90.3^b	95.4^a	3.1	0.002
Trp	88.0^b	85.5^c	90.7^a	2.7	0.002	97.0^a	90.8^b	96.6^a	2.7	0.001
Val	87.2^b	86.9^b	91.7^a	2.4	0.002	95.8^a	91.5^b	96.2^a	2.4	0.001
Dispensable AA
Ala	84.0^b	84.3^b	88.9^a	3.0	0.004	94.0^a	90.3^b	94.7^a	3.0	0.002
Asp	85.8^b	84.2^b	88.7^a	2.9	0.008	92.8^a	88.7^b	93.0^a	2.9	0.004
Cys	81.1^a	73.0^b	81.9^a	4.9	0.005	89.1^a	77.1^b	85.5^a	4.9	0.002
Glu	88.3^a	83.8^b	86.9^ab	3.1	0.040	93.7^a	87.4^b	90.4^ab	3.1	0.013
Gly	72.3^b	77.0^b	84.2^a	5.1	0.027	97.1	92.8	98.9	5.1	0.140
Pro	69.3	79.5	86.9	6.2	0.071	101.1	99.6	106.9	6.2	0.485
Ser	85.5^b	84.5^b	90.0^a	2.8	0.004	96.3^a	90.8^b	96.1^a	2.8	0.002
Tyr	89.1^b	90.0^b	94.7^a	1.8	0.002	100.1^a	94.5^b	99.2^a	1.8	0.001

¹Data are least square means of 6, 8, and 7 observations for basal diet, spray-dried plasma protein (SDPP) 1 diet, and SDPP 2 diet, respectively.

²Spray-dried plasma protein 1 was sourced from APC Inc. (Ankeny, IA); SDPP 2 was sourced from NongHyup Feed Inc., LTD. (Seoul, Korea).

³Values for the SID of crude protein and AA were calculated by correcting the AID values for basal endogenous losses of crude protein and AA from Sung et al. (2020). Basal endogenous losses (g/kg feed intake) used for the calculation of SID values were crude protein, 19.90; Arg, 0.64; His, 0.25; Ile, 0.41; Leu, 0.70; Lys, 0.67; Met, 0.13; Phe, 0.44; Thr, 0.85; Trp, 0.17; Val, 0.62; Ala, 0.80; Asp, 1.09; Cys, 0.27; Glu, 1.46; Gly, 1.45; Pro, 2.88; Ser, 0.84; and Tyr, 0.37.

^a–cWithin a row, means without a common superscript letter differ (P < 0.05).