Table 1.

The composition of experimental diets.

Composition	Starter (0 to 6 wk)	Grower and developer (7 to18 wk)	Layer (19 to 80 wk)
Corn	64.82	61.08	60.72
Soybean meal	31.01	22.13	25.39
Wheat bran	-	6.38	-
Limestone	1.40	1.31	8.76
CaHPO4	1.41	1.20	1.62
Soybean oil	0.35	1.61	1.43
Maifan stone 1	-	5.20	1.05
NaCl	0.32	0.32	0.32
Lysine	0.09	0.14	0.23
Methionine	0.09	0.09	0.14
Threonine	-	0.11	-
Choline chloride	0.26	0.18	0.09
Mineral premix 2	0.20	0.20	0.20
Vitamin premix 3	0.05	0.05	0.05
Nutrient levels
Crude protein, %	19.00	16.00	16.50
AME, Kcal/kg	2850	2750	2700
Calcium, %	0.90	0.80	3.50
Measured calcium, %	1.31	1.16	3.76
Available phosphorus, %	0.40	0.35	0.41
Measured phosphorus, %	0.78	0.52	0.73
Lysine, %	1.00	0.86	0.95
Methionine, %	0.40	0.35	0.41
Met+Cys, %	0.73	0.63	0.70

¹Maifan stone without calcium and phosphorus; the phytase addition rate of dietary deducted from Maifan stone.

²The mineral premixes provided the following per kilogram of diet: Fe 55 mg, Mn 88 mg, Cu 5.5 mg, Zn 88 mg, I 1.7 mg, Se 0. 3mg.

³The vitamin premixes provided the following per kilogram of diet: VA 8,800 IU, VD₃ 3,300 IU, VE 16.15 IU, VK 2.2 mg, VB₁ 1.7 mg, VB₂ 5.5 mg, VB₃ 28 mg, VB₅ 6.6 mg, VB₆ 3.3 mg, VB₇ 0.1 mg, VB₉ 0.6 mg, VB₁₂ 0.05 mg.