Table 1.

Composition and nutrient levels of basal diets (air-dry basis).

Items	Phase 1 (d 1 to d 21)	Phase 2 (d 22 to d 42)	Phase 3 (d 43 to d 63)
Ingredients, %
Corn	58.61	63.94	72.85
Soybean meal, 46% CP	27.80	21.92	13.30
Expanded soybean	9.00	10.00	10.00
Limestone powder	1.24	1.05	1.00
Dicalcium phosphate	1.89	1.69	1.41
DL-Methionine, 98%	0.16	0.10	0.07
Lysine	0.00	0.00	0.07
Premix 1	1.00	1.00	1.00
NaCl	0.30	0.30	0.30
Total	100.00	100.00	100.00
Nutrient levels 2
Metabolizable energy, MJ/kg	12.13	12.42	12.76
Crude protein, %	20.83	19.00	15.99
Calcium, %	1.00	0.87	0.77
Total phosphorus, %	0.68	0.63	0.55
Non-phytate phosphorus, %	0.45	0.42	0.37
Lysine, %	1.10	0.98	0.82
Methionine + Cystine, %	0.85	0.75	0.64

¹ Nutrient levels of premix in Phase 1 (per kg diet): vitamin A 8000 IU, vitamin D₃ 2000 IU, vitamin E 20 mg, vitamin K₃ 1 mg, vitamin B₁ 2.6 mg, vitamin B₂ 5.4 mg, vitamin B₆ 5 mg, vitamin B₁₂ 0.02 mg, nicotinic acid 40 mg, pantothenic acid 20 mg, biotin 0.2 mg, folic acid 0.8 mg, choline chloride 1000 mg, Cu 8 mg, Fe 80 mg, Mn 80 mg, Zn 60 mg, I 0.35 mg, Se 0.15 mg; Nutrient levels of premix in Phase 2 (per kg diet): vitamin A 8000 IU, vitamin D₃ 2000 IU, vitamin E 20 mg, vitamin K₃ 1 mg, vitamin B₁ 2.6 mg, vitamin B₂ 5.4 mg, vitamin B₆ 5 mg, vitamin B₁₂ 0.02 mg, nicotinic acid 35 mg, pantothenic acid 20 mg, biotin 0.2 mg, folic acid 0.8 mg, choline chloride 750 mg, Cu 8 mg, Fe 80 mg, Mn 80 mg, Zn 60 mg, I 0.35 mg, Se 0.15 mg; Nutrient levels of premix in Phase 3 (per kg diet): vitamin A 8000 IU, vitamin D₃ 2000 IU, vitamin E 20 mg, vitamin K₃ 1 mg, vitamin B₁ 2.6 mg, vitamin B₂ 5.4 mg, vitamin B₆ 5 mg, vitamin B₁₂ 0.02 mg, nicotinic acid 30 mg, pantothenic acid 20 mg, biotin 0.2 mg, folic acid 0.8 mg, choline chloride 500 mg, Cu 8 mg, Fe 80 mg, Mn 80 mg, Zn 60 mg, I 0.35 mg, Se 0.15 mg. ² Nutrient levels were calculated values.