Table 6. Digestibility of essential amino acids according to dietary crude protein and additional Phytase levels

Treatments		ARG (%)	HIS (%)	I-LE (%)	LEU (%)	LYS (%)	MET (%)	PHE (%)	THR (%)	VAL (%)
CP (%)	Phytase (FTU/kg)
20	1,000	89.6	85.1	79.4ab	84.2a	86.3	79.8b	83.3	78.4ab	72.3a
	800	86.0	81.5	71.5c	76.6c	81.6	78.8b	77.7	70.6c	62.0b
	500	90.2	85.4	80.5a	84.2a	85.6	85.1a	83.5	76.8abc	73.5a
19	1,000	89.0	84.4	76.7abc	81.6abc	84.1	80.6b	82.6	77.1abc	70.8a
	800	90.0	86.3	80.5a	84.0a	85.3	85.0a	83.8	80.4a	73.3a
	500	89.3	85.2	79.5ab	83.4ab	85.2	85.2a	83.3	79.0ab	72.1a
18	1,000	90.2	85.4	80.5a	84.2a	85.6	85.1a	83.5	76.8abc	73.5a
	800	84.8	79.7	72.9bc	77.1c	80.7	80.0b	77.2	71.3c	62.2b
	500	90.1	86.1	79.5ab	83.6ab	85.4	82.6ab	83.8	80.1a	73.1a
SEM1		3.13	3.63	4.31	3.99	3.33	3.39	3.71	4.18	5.34
Crude protein (%)
20		88.6	84.0	77.1	81.7	84.5	81.2	81.5	75.2	69.2
19		89.3	85.2	78.9	83.0	84.9	83.4	83.2	78.8	72.1
18		87.0	81.7	74.6	79.4	82.4	80.4	79.8	74.7	65.4
SEM3		3.07	3.97	5.17	4.63	3.52	3.49	4.11	4.95	6.64
Phytase (ppm)
1,000		88.2	82.9	75.8	81.1	83.8	79.6b	81.5	76.0	68.0ab
800		86.8	82.5	75.0	79.2	82.5	81.2b	79.5	74.1	65.8b
500		89.8	85.5	79.8	83.8	85.4	84.3a	83.5	78.6	72.9a
SEM2		2.96	4.03	5.02	4.49	3.49	6.65	4.01	4.94	6.54
P-Value
Crude protein		0.18	0.11	0.14	0.17	0.19	0.19	0.08	0.09	0.06
Phytase		0.05	0.17	0.05	0.06	0.15	<0.05	0.07	0.09	<0.05
Phytase × CP		0.05	0.05	<0.01	<0.05	0.14	<0.05	0.05	<0.01	<0.01

SEM, standard error of means (n = 4).
SEM, standard error of means (n = 12).
SEM, standard error of means (n = 12).
Means in same rows with different superscripts are significantly different (P<0.01, P<0.05).