Effects of age on immune function in broiler chickens

Table 1 Diet composition and nutrient levels

Item, g/kg (unless otherwise indicated)	d 1 to 21	d 22 to 42
Ingredient
Corn (7.8% CP)	513.8	600.2
Soybean meal (46% CP)	407.1	255.4
Corn protein flour	0.0	56.6
Soybean oil	37.5	33.2
Wheat flour	0.0	20.0
Dicalcium phosphate	18.6	13.3
Limestone	12.4	11.4
Sodium chloride	3.5	3.5
DL-Methionine, (98%)	2.0	0.7
L-Lys-HCl, (98%)	0.0	1.9
Vitamin premix^a	0.3	0.3
Mineral premix^b	2.0	2.0
Choline chloride, (50%)	2.5	1.6
Ethoxyquin, (33%)	0.3	0.0
Nutrient level^c
Metabolizable energy, Mcal/kg	2.93	3.10
Crude protein	217.6	200.0
Calcium	10.1	9.0
Available phosphorus	4.4	3.5
Lysine	11.4	10.0
Methionine	5.4	4.0

^aSupplied per kilogram of complete feed: vitamin A, 12,500 IU; vitamin D₃, 2,500 IU; vitamin E, 30 IU; vitamin K₃, 2.65 mg; vitamin B₁, 2 mg; vitamin B₂, 6 mg; vitamin B₅, 12 mg; vitamin B₁₂, 0.025 mg; niacin, 50 mg; folic acid, 1.25 mg and biotin, 0.0325 mg
^bSupplied per kilogram of complete feed: Mn, 100 mg; Fe, 80 mg; Zn, 75 mg; Cu, 8 mg; I, 0.35 mg; and Se, 0.15 mg
^cCalculated value based on the analysis of experimental diets

ISSN: 2049-1891