Table 1.

Composition of broiler starter, grower, and finisher diets.

Ingredient	Starter4	Grower5	Finisher6
	(%)
Corn	57.65	64.50	66.53
Soybean meal (48% CP)	32.02	24.29	21.55
Poultry by-product meal	5.00	5.86	5.22
Poultry fat	2.00	2.51	3.99
Dicalcium phosphate (18.5% P)	1.24	0.83	0.67
Limestone	0.61	0.73	0.66
Salt	0.50	0.50	0.50
Choline chloride (60%)	0.20	0.20	0.20
Vitamin premix1	0.05	0.05	0.05
Mineral premix2	0.20	0.20	0.20
Selenium premix3	0.05	0.05	0.05
DL-Methionine	0.23	0.17	0.11
L-Lysine	0.14	0.20	0.13
L-Threonine	0.11	0.09	0.14
Total	100.00	100.00	100.00
Calculated nutrient content
Crude protein	23.00	20.00	18.50
Calcium	0.90	0.80	0.70
Available phosphorus	0.45	0.40	0.35
Potassium	0.88	0.76	0.72
Total lysine	1.31	1.14	1.00
Total methionine	0.59	0.49	0.42
Total threonine	0.88	0.76	0.76
Total methionine + cysteine	0.95	0.81	0.72
Sodium	0.22	0.22	0.22
Chloride	0.23	0.23	0.23
Metabolizable energy (kcal/g)	2,935	3,050	3,150

¹Vitamin premix supplied the following per kg of diet: 13,200 IU vitamin A, 4,000 IU vitamin D₃, 33 IU vitamin aE, 0.02 mg vitamin B₁₂, 0.13 mg biotin, 2 mg menadione (K₃), 2 mg thiamine, 6.6 mg riboflavin, 11 mg d-pantothenic acid, 4 mg vitamin B₆, 55 mg niacin, and 1.1 mg folic acid.

²Mineral premix supplied the following per kg of diet: manganese, 120 mg; zinc, 120 mg; iron, 80 mg; copper, 10 mg; iodine, 2.5 mg; and cobalt, 1 mg.

³Selenium premix provided 0.2 mg Se (as Na₂SeO₃) per kg of diet.

⁴Starter diet was fed to approximately 14 d of age, 910 g per bird.

⁵Grower diet was fed from approximately 15 to 35 d of age, 2,750 g per bird.

⁶Finisher diet was fed from approximately 36 to end of experiment.