Table 4.

Analyzed composition of experimental diets (as-fed basis)^a

Diets	Analyzed composition
	CP, %	Ca, %	P, %	Ca:P	Phytase, FTU/kg
Phase 1
NCb	21.8	0.88	0.61	1.44	< 60
NC + 500 FTU	22.3	0.87	0.64	1.36	612
NC + 1,000 FTU	22.1	0.89	0.63	1.41	1,100
NC + 2,000 FTU	22.1	0.90	0.64	1.40	2,060
NC + 3,000 FTU	22.4	0.93	0.64	1.45	3,880
NC + 4,000 FTU	22.2	0.85	0.60	1.42	5,270
PCc	21.8	1.10	0.76	1.45	< 60
PC + 2,000 FTU	22.4	1.07	0.80	1.34	2,580
Phase 2
NC	21.8	0.75	0.59	1.27	< 60
NC + 500 FTU	21.6	0.78	0.58	1.34	650
NC + 1,000 FTU	21.3	0.83	0.61	1.36	1,350
NC + 2,000 FTU	21.9	0.84	0.63	1.33	2,590
NC + 3,000 FTU	22.6	0.75	0.56	1.33	3,630
NC + 4,000 FTU	22.6	0.89	0.67	1.33	5,200
PC	21.6	1.01	0.74	1.36	< 60
PC + 2,000 FTU	22.2	0.94	0.75	1.25	2,560
Phase 3
NC	20.8	0.75	0.63	1.19	< 60
NC + 500 FTU	22.0	0.75	0.61	1.23	536
NC + 1,000 FTU	21.6	0.73	0.60	1.22	1,190
NC + 2,000 FTU	21.5	0.78	0.61	1.28	2,280
NC + 3,000 FTU	21.9	0.70	0.60	1.17	3,710
NC + 4,000 FTU	21.8	0.70	0.63	1.11	4,660
PC	21.9	0.87	0.77	1.13	62
PC + 2,000 FTU	22.2	0.87	0.77	1.13	2,110

^aSeven subsamples were pooled and proximate analysis was performed in triplicate by a commercial laboratory (Ward Laboratories, Kearney, NE). In addition, phytase analysis was conducted in duplicate to determine complete diet phytase concentrations at another commercial laboratory (Eurofins Scientific Inc., Des Moines, IA).

^bNegative Control.

^cPositive Control.