Table 5. Digestibility of dry matter, crude protein, ether extract, and phosphorus according to dietary crude protein and additional Phytase levels

Treatments		Dry matter (%)	Crude protein (%)	Ether extract (%)	Phosphorus (%)
CP (%)	Phytase (FTU/kg)	Dry matter (%)	Crude protein (%)	Ether extract (%)	Phosphorus (%)
20	1,000	61.9^c	63.7	70.4	45.9^b
	800	65.6^bc	67.1	76.5	48.3^ab
	500	65.4^bc	66.7	75.9	44.0^bc
19	1,000	65.6^bc	67.1	76.5	48.3^ab
	800	72.8^a	68.2	84.3	58.1^a
	500	69.8^ab	70.4	81.4	53.0^ab
18	1,000	65.4^bc	66.7	75.9	44.0^bc
	800	71.6^ab	72.2	85.2	53.4^ab
	500	71.1^ab	72.0	73.6	48.9^ab
SEM¹		4.09	4.92	8.76	6.45
Crude protein (%)
20		63.0^b	65.4	71.5^b	43.1^b
19		69.4^a	68.6	80.7^a	53.1^a
18		69.3^a	70.3	78.2^ab	48.7^ab
SEM³		4.58	4.98	8.81	7.43
Phytase (ppm)
1,000		64.3	65.8	74.3	46.1
800		68.7	68.1	79.6	49.1
500		68.8	70.4	76.6	49.8
SEM²		5.07	5.07	9.44	8.39
P-Value
Crude protein		<0.01	0.06	<0.05	<0.01
Phytase		0.06	0.11	0.39	0.51
Phytase × CP		<0.01	0.16	0.15	<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).