Table 1 Ingredient composition and calculated nutrient contents of basal diets (as-fed basis).

Item	Starter (day 0 to 10)	Grower (day 10 to 24)	Finisher (day 24 to 42)
Ingredients (%)
Corn	55.46	57.72	61.35
Soybean meal, 44%	32.18	30.15	26.71
Corn gluten meal, 60%	5.25	4.25	3.1
Soybean oil	2.2	3.5	4.8
Dicalcium phosphate	1.95	1.71	1.5
Limestone	1.16	1.07	1
Salt (NaCl)	0.22	0.23	0.2
Sodium bicarbonate	0.11	0.1	0.14
Vitamin premix¹	0.25	0.25	0.25
Trace mineral premix²	0-0.25	0-0.25	0-0.25
DL-Methionine	0.26	0.23	0.22
L-Lysine HCl	0.43	0.32	0.28
L-Threonine	0.21	0.15	0.13
Building sand	0-0.32	0-0.32	0-0.32
Total	100	100	100
Calculated nutritive value
Metabolizable energy, kcal/kg	3000	3100	3200
Crude protein (%)	23.0	21.5	19.5
Calcium (%)	0.96	0.87	0.79
Nonphytate phosphorus (%)	0.48	0.44	0.40
Sodium (%)	0.16	0.16	0.16
Digestible lysine (%)	1.28	1.15	1.03
Digestible methionine (%)	0.62	0.55	0.51
Digestible methionine + cysteine (%)	0.95	0.87	0.80
Digestible threonine (%)	0.86	0.77	0.69
DEB³, mEq/kg	250	240	230

¹Supplied per kg diet: 18 mg retinol, 4 mg cholecalciferol, 36 mg a-tocopherol acetate, 2 mg vitamin K₃, 1.75 mg vitamin B₁, 6.6 mg vitamin B₂, 9.8 mg niacin, 29.65 mg pantothenic acid, 2.94 mg vitamin B₆, 1 mg folic acid, 0.015 mg vitamin B₁₂, 0.1 mg biotin, 250 mg choline chloride and 1 mg ethoxyquin.
²The trace mineral (TM) supplementation were referred to our experimental design. The TM premixes were added in place of the building sand that is used as inert filler to adjust the formulation.
³DEB (dietary electrolyte balance) = (Na⁺, mEq/kg + K⁺, mEq/kg) – CL⁻, mEq/kg.

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