Table 3.

Chemical composition of experimental diets, as-fed basis

Item			Phytase, FTU1 per kilogram complete feed
	PC2	NC	500	1,000	2,000	4,000
GE, kcal/kg	3,946	4,025	4,032	4,015	3,992	4,005
DM, %	86.91	86.84	86.75	87.06	87.02	86.80
CP (N × 6.25), %	17.88	18.08	16.81	18.51	18.40	19.29
Ash, %	5.07	4.65	4.39	4.76	4.69	4.80
NDF, %	8.91	7.96	7.87	8.36	9.64	8.46
ADF, %	2.91	2.70	2.61	2.68	3.42	3.96
Ca, %	0.70	0.43	0.42	0.46	0.48	0.48
P, %	0.51	0.34	0.32	0.32	0.33	0.33
STTD3 P, %	0.31	0.16	0.16	0.16	0.16	0.16
Phytase, FTU/kg	<70	<70	595	1,120	2,030	3,885
K, %	0.81	0.80	0.77	0.82	0.78	0.82
S, %	0.21	0.20	0.20	0.21	0.21	0.20
Na, %	0.16	0.13	0.15	0.15	0.16	0.14
Mg, %	0.13	0.14	0.13	0.13	0.13	0.13
Ti, %	0.24	0.22	0.23	0.23	0.24	0.24
Fe, mg/kg	273	179	168	156	173	162
Zn, mg/kg	125	138	118	147	155	114
Mn, mg/kg	79	73	69	74	81	72
Cu, mg/kg	15	12	13	12	12	13
Indispensable AA, %
Arg	1.16	1.28	1.20	1.19	1.25	1.17
His	0.52	0.55	0.54	0.53	0.54	0.52
Ile	0.80	0.88	0.84	0.83	0.86	0.81
Leu	1.54	1.70	1.61	1.60	1.66	1.57
Lys	1.10	1.19	1.17	1.17	1.20	1.13
Met	0.28	0.30	0.30	0.28	0.29	0.27
Phe	0.89	1.00	0.92	0.94	0.97	0.92
Thr	0.66	0.75	0.71	0.70	0.73	0.70
Trp	0.23	0.23	0.22	0.25	0.27	0.26
Val	0.88	0.98	0.93	0.91	0.96	0.88
Dispensable AA, %
Ala	0.89	0.98	0.92	0.91	0.96	0.90
Asp	1.78	2.00	1.89	1.87	1.95	1.84
Cys	0.27	0.31	0.29	0.28	0.29	0.28
Glu	3.14	3.51	3.31	3.29	3.43	3.22
Gly	0.76	0.84	0.79	0.78	0.82	0.77
Pro	0.91	1.11	0.96	0.94	1.11	0.94
Ser	0.73	0.84	0.79	0.78	0.83	0.78
Tyr	0.58	0.63	0.59	0.61	0.63	0.60

¹FTU = phytase units.

²PC = positive control; NC = negative control.

³STTD = standardized total tract digestible; values for STTD P are calculated (NRC, 2012); values for STTD P do not include effects of microbial phytase.