Table 2.

Analyzed nutrient composition of experimental diets (as-fed basis, Exp. 2)

	Positive control	Phytase level (FTU/kg)
		0	500	1,000	20,000
Phytase activity (FTU/kg)	31	34	515	992	19,868
DM (%)	87.35	87.79	87.61	87.64	87.83
CP (%)	17.29	17.80	17.00	17.35	17.38
Ca (%)	0.64	0.41	0.44	0.42	0.45
P (%)	0.52	0.38	0.38	0.38	0.38
Phytate-P (%)	0.22	0.23	0.23	0.22	0.20
Sodium, Na (g/kg)	1.27	1.29	1.31	1.28	1.27
Potassium, K (g/kg)	0.64	0.66	0.65	0.64	0.65
Iron, Fe (mg/kg)	111	104	118	116	112
Copper, Cu (mg/kg)	14.99	15.85	18.28	18.32	18.30
Manganese, Mn (mg/kg)	29.14	29.70	31.81	31.82	31.01
Zinc, Zn (mg/kg)	88.80	72.03	72.05	83.29	77.65
Magnesium, Mg (g/kg)	1.96	1.93	1.96	2.00	2.00
Essential AA (%)
Arginine	1.09	1.16	1.10	1.13	1.06
Histidine	0.48	0.48	0.45	0.47	0.46
Isoleucine	0.67	0.70	0.66	0.69	0.68
Leucine	1.46	1.49	1.40	1.45	1.49
Lysine	0.91	0.95	0.88	0.91	0.91
Methionine	0.30	0.30	0.30	0.30	0.32
Phenylalanine	0.89	0.90	0.84	0.88	0.82
Threonine	0.59	0.64	0.62	0.66	0.66
Tryptophan	0.18	0.17	0.19	0.19	0.18
Valine	0.82	0.81	0.83	0.85	0.85
Nonessential AA (%)
Alanine	0.91	0.96	0.90	0.94	0.93
Aspartic acid	1.63	1.62	1.62	1.68	1.67
Cystine	0.35	0.34	0.34	0.34	0.35
Glutamic acid	3.47	3.50	3.26	3.42	3.36
Glycine	0.67	0.68	0.67	0.69	0.69
Proline	1.08	1.09	1.07	1.07	1.08
Serine	0.81	0.88	0.84	0.85	0.84
Tyrosine	0.62	0.56	0.57	0.59	0.54