Table 1.

Calculated and analyzed nutrient content of the basal diets.

Feeding phase	Starter diets		Grower diets
Phytate P	Standard	High	Standard	High
Ingredient, % of diet (as-fed basis)
Corn	51.58	51.30	59.07	58.78
Soybean meal, 48%	27.62	25.60	20.40	18.39
Rice dried distillers grains w/solubles, 47%	5.00	5.00	5.00	5.00
Polished rice	12.00		12.00
De-oiled rice bran		12.00		12.00
Soybean oil	0.52	3.31	0.99	3.78
Salt	0.42	0.43	0.37	0.37
Limestone	1.00	0.55	1.04	0.60
Dicalcium phosphate1	0.95	0.85	0.67	0.57
Lysine-HCl	0.20	0.23	0.14	0.18
DL-methionine	0.19	0.20	0.12	0.13
Threonine	0.02	0.03		0.01
Premix2	0.15	0.15	0.15	0.15
Inert (corn/phytase)3	0.04	0.04	0.04	0.04
Xylanase4	0.01	0.01	0.01	0.01
Chromium	0.30	0.30
Nutrient composition, %
Crude protein	21.35	21.35	18.35	18.35
ME, kcal/kg	2955.00	2955.00	3060.00	3060.00
Dry matter	87.49	87.70	87.69	87.90
Calcium	0.72	0.72	0.66	0.66
Total phosphorus	0.54	0.74	0.46	0.66
Available phosphorus	0.25	0.25	0.20	0.20
Phytate phosphorus	0.24	0.45	0.23	0.44
Total methionine + cysteine	0.93	0.94	0.78	0.79
Total lysine	1.25	1.26	1.00	1.01
Digestible methionine + cysteine	0.83	0.83	0.69	0.69
Digestible lysine	1.13	1.13	0.90	0.90
Sodium	0.18	0.18	0.16	0.16

¹Dicalcium phosphate supplied 17% P and 21% Ca.

²Supplied per kilogram of diet: iron (ferrous sulfate), 34 mg; manganese (manganese sulfate), 38 mg; zinc (zinc sulfate), 34 mg; copper (basic copper chloride), 6 mg; iodine (calcium iodate), 0.8 mg; selenium (sodium selenite), 113 μg; vitamin A, 9.4 MIU; vitamin D₃ 2.1 MIU; vitamin E, 22.5 mg; vitamin B₁₂, 11 μg; riboflavin, 3.8 mg; niacin, 25 mg; d-pantothenic acid, 11 mg; vitamin K, 1.5 mg; folic acid, 0.8 mg; vitamin B₆, 1.9 mg; thiamine, 1.5 mg; and biotin, 60 μg.

³Corn was added in place of phytase in the diets without phytase supplementation. The phytase used was Quantum Blue (AB Vista, Marlborough, UK) with an expected activity of 5,000 FTU/g.