Table 1.

Ingredients and experimental diets of laying hens.

	Dietary treatments
	0	25	50	75	100
Ingredients, %
Corn	60.58	59.76	58.81	58.24	57.00
Soybean meal (44%)	22.00	16.50	11.00	5.50	0.00
Faba beans (30%)1	00.00	5.50	11.00	16.50	22.00
Gluten meal (62%)	5.01	6.20	7.40	8.73	10.07
Limestone	8.17	8.20	8.30	8.32	8.35
Di-calcium	1.82	1.82	1.75	1.70	1.63
Layer premix2	0.30	0.30	0.30	0.30	0.30
Salt	0.30	0.30	0.30	0.30	0.30
l-Lysine HCL	0.01	0.08	0.11	0.15	0.18
Dl-methionine	0.09	0.14	0.15	0.16	0.17
Vegetable oil	1.72	1.20	0.78	0.10	0.00
Nutrient composition, %3
Crude protein	18.00	18.01	18.00	18.00	18.00
ME, kcal/kg	2851	2851	2854	2849	2872
Ca	3.63	3.64	3.65	3.63	3.61
Non-phytate P	0.46	0.45	0.45	0.45	0.45
Lysine	0.85	0.85	0.85	0.85	0.85
Met + Cys	0.75	0.75	0.75	0.75	0.75
Crude fiber	3.08	3.06	3.19	3.31	3.43
Threonine	0.65	0.76	0.88	0.99	1.10
Linoleic acid	2.28	1.40	1.38	1.36	1.34
Ether extract	2.60	2.70	2.80	2.92	3.01
Nutrient composition, %4
DM	89.16	89.00	88.79	88.70	88.68
OM	79.52	95.10	95.54	95.05	95.41
CP	17.97	18.08	17.71	17.78	18.01
EE	2.25	4.54	4.40	3.84	3.96
CF	2.79	3.12	3.09	2.96	2.90
Ash	2.48	4.90	4.46	4.45	4.59
Cost per ton5	2793	2803	2802	2781	2807

¹Chemical composition of faba bean (%): dry matter 87; crude protein 30; crude fat 2.7; crude fiber 9.3; ash 3.70; Ca 0.10; P 0.46.

²Contained per kg: vit. A, 8000 IU; vit. D₃, 1300 ICU, vit. E 5 mg; vit. K, 2 mg; vit. B1, 0.7 mg; vit. B2, 3 mg; vit. B6, 1.5 mg, vit. B12, 7 mg; Biotin 0.1 mg; Pantothenic acid, 6 g; Niacin, 20 g; Folic acid, 1 mg; Manganese, 60 mg; Zinc, 50 mg; Copper, 6 mg; Iodine, 1 mg; Selenium, 0.5 mg; Cobalt, 1 mg.

³Calculated according to NRC (1994).

⁴Chemical analysis according to AOAC (2006).

⁵Calculated according to the price of feed ingredients when the experiment was started.