Table 3.

Ingredient composition of experimental diets, experiment 2 (as-fed basis)

Phase	1		2		3		4		5
Treatment1	PC	NC	PC	NC	PC	NC	PC	NC	PC	NC
Corn, %	56.70	57.69	63.02	63.94	64.36	63.94	67.44	68.37	68.73	69.62
Wheat middlings, %	15.00	15.00	15.00	15.00	15.00	15.00	15.00	15.00	15.00	15.00
Soybean meal (47.5), %	22.50	22.50	16.25	16.25	15.00	15.00	12.00	12.00	10.75	10.75
Choice white grease, %	3.00	2.25	3.00	2.25	3.00	2.25	3.00	2.25	3.00	2.25
Vitamin trace mineral premix2, %	0.100	0.100	0.100	0.100	0.100	0.100	0.100	0.100	0.100	0.100
Monocalcium phosphate, %	0.580	0.580	0.560	0.560	0.570	0.560	0.580	0.580	0.590	0.590
Limestone, %	0.730	0.730	0.760	0.760	0.770	0.770	0.790	0.790	0.800	0.800
Salt, %	0.400	0.400	0.400	0.400	0.400	0.400	0.400	0.400	0.400	0.400
l-lysine HCl, %	0.300	0.100	0.280	0.110	0.230	0.070	0.150	0.020	0.110	—
l-threonine, %	0.090	—	0.080	—	0.060	—	0.040	—	0.030	—
l-tryptophan, %	0.030	—	0.030	—	0.020	—	0.020	—	—	—
dl-methionine, %	0.015	—	0.050	—	0.020	—	—	—	—	—
Phytase3, %	0.005	0.005	0.005	0.005	0.005	0.005	0.005	0.005	0.005	0.005

¹The NC was formulated to contain 12% less SID lysine with relative lowering of all other AA, plus 0.75 percentage points less added fat. “Diet phase 1 was fed for approximately 14 d, phase 2 through 4 were fed for approximately 21 d each, and phase 5 was the final phase provided to the pigs until they were harvested.”

²Provided per kilogram of diet: Fe, 134 mg; Mn, 19 mg; Cu, 10 mg; I, 0.4 mg; Se, 0.30 mg; Zn, 80 mg; vitamin A, 7 kIU; vitamin D, 1 kIU; vitamin E 33 IU; vitamin K, 3 mg; niacin, 26 mg; riboflavin, 5 mg; pantothenic acid, 18 mg; vitamin B₁₂, 24 µg.

³Quantum Blue 5G Phytase (AB Vista Feed Ingredients; Marlborough, Wiltshire, UK) was added to the NC at 0.020% to create the 1,000 FTU/kg dietary treatment, added at 0.035% to create the 1,750 FTU/kg dietary treatment, and added at 0.050% to create the 2,500 FTU/kg dietary treatment.