Table 1.

Composition and nutrient levels of the experimental diets.

ME, MJ/kg	11.31	11.31	11.31	11.51	11.51	11.51	11.71	11.71	11.71
CP, %	14	15	16	14	15	16	14	15	16
Corn	65.3	63.5	62.8	68.8	66	62.6	68	68	66
Wheat bran	13.5	12	9.5	9.5	9	9	9	6	5
Soybean meal	15.7	19	22.5	16.5	19.5	22.5	17	20.5	23.5
Soybean oil	0.5	0.5	0.2	0.2	0.5	0.9	1	0.5	0.5
Premix1	5	5	5	5	5	5	5	5	5
Total	100	100	100	100	100	100	100	100	100
Nutritional levels2
ME, MJ/kg	11.31	11.31	11.32	11.51	11.52	11.51	11.72	11.71	11.70
CP, %	14.01	15.04	16.03	14.00	14.98	15.99	14.04	15.04	16.03
Lysine, %	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80
Methione + Cystine, %	0.54	0.54	0.54	0.54	0.54	0.54	0.54	0.54	0.54
Calcium, %	0.73	0.72	0.75	0.74	0.72	0.73	0.74	0.76	0.72
Total phosphorus, %	0.63	0.61	0.62	0.64	0.60	0.63	0.64	0.62	0.60
Available phosphorus, %	0.33	0.32	0.34	0.32	0.33	0.31	0.35	0.31	0.31

¹Premix provided per kilogram of diet: Vitamin A, 6000 IU; Vitamin D, 2800 IU; Vitamin E, 20 IU; Vitamin K, 2.4 mg; Vitamin B12, 0.027 mg; Thiamine, 2.0 mg; Riboflavin, 5.2 mg; D-Calcium pantothenate, 11 mg; Niacin, 30 mg; Pyridoxine, 3.6 mg; Biotin, 0.2 mg; Folic acid, 1.2 mg; Choline, 800 mg; Manganese, 90 mg; Iodine, 1.8 mg; Ferrous, 100 mg; Copper, 8 mg; Zinc, 80 mg; Selenium, 0.30 mg. Any deficiencies in the methionine and lysine content of the diets were made up in the 5% premix.

²CP, calcium, and available phosphorus are measured values, the rest of the nutrient levels are calculated from the data provided by Feed Database in China (2013).