Table 1.

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

Item	22–42 d
Ingredients
Maize	64.0
Soybean meal	27.8
Soybean oil	3.0
Fish power	2.5
Calcium hydrogen phosphate	1.4
Sodium chloride	0.30
Premix 1	1.0
Nutrient level
ME/(MJ/kg) 2	13.03
Crude protein	20.02
Lysine	1.02
Methionine + Cystine	0.78
Calcium	1.00
Total phosphorus	0.67

¹ The premix provided the following nutrients per kg of diets: Mn (as manganese sulfate) 66 mg, Zn 44 mg, Cu (as copper sulfate) 9 mg, Fe (as ferrous sulfate) 50 mg, I (as potassium iodide) 0.4 mg, vitamin A 7000 IU, vitamin D₃ 875 IU, vitamin E 20 IU, vitamin K₃ 1 mg, vitamin B₁ 2 mg, vitamin B₂ 4.5 mg, D-pantothenic acid 12 mg, nicotinic acid 50 mg, vitamin B₆ 2.5 mg, vitamin B₁₂ 0.6 mg. ² Metabolizable energy (ME) was a calculated value. On the base of apparent metabolizable energy, the equation calculating ME can be expressed as ME = 13.7* maize% + 10.4* soybean meal% + 35.1* soybean oil% + 12.8* fish powder%.