Table 1 Composition of experimental diets
(%, as-fed basis)

Item		Daily lysine intake (mg)
Item		732	785	838	891	944	997	1050
Corn		-	-	6.80	24.00	48.70	48.70	48.70
Wheat		67.88	67.88	60.88	38.36	11.16	10.16	10.10
Wheat bran		13.39	11.98	10.66	13.00	12.57	12.94	12.94
Soybean meal		7.36	9.20	10.70	13.47	16.40	17.00	17.00
Vegetable oil		1.93	1.50	1.50	2.00	2.00	2.00	2.00
Limestone		6.70	6.70	6.70	6.60	6.60	6.60	6.60
Monocalcium phosphorous		1.80	1.80	1.80	1.80	1.80	1.80	1.80
Salt		0.30	0.30	0.30	0.30	0.30	0.30	0.30
Vitamin-mineral premix¹		0.30	0.30	0.30	0.30	0.30	0.30	0.30
L-Lysine		-	-	0.02	-	-	0.03	0.09
DL-Methionine		0.17	0.17	0.17	0.17	0.17	0.17	0.17
L-Threonine		0.17	0.17	0.17	-	-	-	-
Calculated composition²	ME (kcal/kg³)	2,800	2,800	2,800	2,805	2,807	2,800	2,800
	Crude protein (%)	15	15	15	15	15	15	15
	Calcium (%)	3.00	3.00	3.00	3.00	3.00	3.00	3.00
	Available P (%)	0.50	0.50	0.50	0.50	0.50	0.50	0.50
	Total lysine (%)	0.55	0.59	0.63	0.67	0.71	0.75	0.79
	Total methionine (%)	0.41	0.41	0.41	0.42	0.41	0.42	0.42
	Total arginine (%)	0.79	0.81	0.84	0.88	0.88	0.92	0.93

¹ Vitamin-mineral premix provided the following nutrients (per kg of air-dry diet): Vitamins; A 12,000 IU, D 33,000 IU, E 15 mg, K 2 mg, thiamine 2 mg, riboflavin 6 mg, pyridoxine 2 mg, calcium pantothenate 0.03 mg, folic acid 0.2 mg, niacin 45 mg, biotin 0.15 µg. Minerals; calcium 0.5%, Co 0.5 mg (as cobalt sulphate), Cu 10 mg (as copper sulphate), iodine 0.9 mg (as potassium iodine), iron 80 mg (as ferrous sulphate), Mn 80 mg (as manganous oxide), Se 0.2 mg (as sodium selenite), Zn 80 mg (as zinc oxide).
² The values are calculated according to the values of feedstuffs in NRC (1994).
³ ME: Metabolizable energy.