Table 2.

Composition of experimental basal diet in Exp.2 (% as-fed basis)

Items	Content, %
	1–21 d	22–35 d
Ingredients
Corn	37.35	47.79
Extruded corn	18.00	15.00
Soybean meal	13.00	18.50
Extruded soybean	10.00	6.00
Fish meal	4.00	3.00
Spray-dried plasma protein	3.00	0.00
Whey powder	10.00	5.00
Soy oil	1.03	1.08
CaHPO4	0.78	0.66
Limestone	0.95	0.90
NaCl	0.30	0.30
L-Lysine HCl	0.32	0.39
DL-Methionine	0.16	0.20
L-Threonine	0.11	0.16
L-Tryptophan	0.00	0.02
Vitamin-mineral premixa	1.00	0.00
Vitamin-mineral premixb	0.00	1.00
Total	100	100
Nutrient composition
DE, kcal/kg	3542	3490
CP, %	20.56	18.88
Ca, %	0.8	0.7
Digestible P, %	0.4	0.34
Lys, %	1.35	1.24
Met, %	0.39	0.36
Thr, %	0.79	0.73
Trp, %	0.23	0.20

^aThe premix provided for per kg of feed: Zn, 100 mg; Mn, 4 mg; Fe, 100 mg; Cu, 6 mg; I, 0.14 mg;Se, 0.3 mg; choline chloride, 500 mg; vitamin A, 10,500 IU; vitamin D₃, 3,300 IU; vitamin E, 22.5 IU; vitamin K₃, 3 mg; vitamin B₁, 3 mg; vitamin B₂, 7.5 mg; vitamin B₆, 4.5 mg; vitamin B₁₂, 0.03 mg; niacin, 30 mg; pantothenate, 15 mg; folic acid, 1.5 mg; biotin, 0.12 mg

^bThe premix provided for per kg of feed: Zn, 80 mg; Mn, 3 mg; Fe,100 mg; Cu, 5 mg; I, 0.14 mg; Se, 0.25 mg; choline chloride, 400 mg; vitamin A, 10,500 IU; vitamin D₃, 3,300 IU; vitamin E, 22.5 IU; vitamin K₃, 3 mg; vitamin B₁, 3 mg; vitamin B₂, 7.5 mg; vitamin B₆, 4.5 mg; vitamin B₁₂, 0.03 mg; niacin, 30 mg; pantothenate, 15 mg; folic acid, 1.5 mg; biotin, 0.12 mg