The optimal dietary arginine level of laying hens fed with low-protein diets

Table 1 Ingredient and nutrition composition of experimental diets (DM basis)

Ingredients, %	Control^a	Dietary arginine level in LP diet, %^b
Ingredients, %	Control^a	0.80	0.85	0.90	0.95	1.00
Corn	62	68.61	68.55	68.51	68.46	68.41
Soybean meal (46% CP)	23	16.81	16.81	16.81	16.81	16.81
Soybean oil	1	–	–	–	–	–
Limestone	8	8	8	8	8	8
Premix^c	6	6	6	6	6	6
L-Lysine-H₂SO₄ (70%)	–	0.2	0.2	0.2	0.2	0.2
DL-Met (99%)	–	0.03	0.03	0.03	0.03	0.03
L-Thr (99%)	–	0.11	0.11	0.11	0.11	0.11
L-Trp (99%)	–	0.04	0.04	0.04	0.04	0.04
L-Val (99%)	–	0.1	0.1	0.1	0.1	0.1
L-Ile (99%)	–	0.1	0.1	0.1	0.1	0.1
L-Arg (99%)	–	–	0.05	0.10	0.15	0.20
Calculated analysis
ME, kcal/kg	2643	2643	2643	2643	2643	2643
Trp, %	0.21	0.21	0.21	0.21	0.21	0.21
Analyzed values^d, %
CP	15.93	14.14	13.98	14.18	14.08	14.08
Ca	3.52	3.49	3.46	3.50	3.60	3.51
AP	0.46	0.46	0.47	0.45	0.42	0.46
Lys	0.93	0.91	0.94	0.92	0.89	0.90
Met	0.43	0.41	0.40	0.43	0.38	0.41
Met+Cys	0.69	0.66	0.69	0.69	0.66	0.68
Thr	0.69	0.65	0.68	0.65	0.65	0.67
Gly	0.50	0.47	0.49	0.47	0.47	0.48
Val	0.73	0.72	0.74	0.71	0.71	0.73
Ile	0.63	0.58	0.61	0.60	0.59	0.62
Leu	1.26	1.19	1.20	1.18	1.20	1.21
Phe	0.66	0.65	0.66	0.67	0.67	0.66
Asp	1.10	1.09	1.15	1.11	1.11	1.12
Ser	0.62	0.59	0.61	0.61	0.59	0.62
Glu	2.43	2.37	2.34	2.36	2.36	2.35
Ala	0.67	0.65	0.67	0.66	0.66	0.65
His	0.47	0.45	0.43	0.43	0.43	0.44
Arg	0.96	0.80	0.86	0.91	0.95	1.02
Arg:Lys	103	88	91	99	107	113

^aThe control hens were fed a diet with 16% protein level;
^bThe experimental groups were provided a 14% protein diets (0.80% Arginine) supplemented with 0, 0.05%, 0.10%, 0.15%, and 0.20% L-Arg, respectively;
^cThe premix provide the follow quantities (per kilogram): vitamin A, 230 KIU; vitamin D₃, 75 KIU; vitamin K, 86 mg; vitamin B₁, 60 mg; vitamin B₂, 150 mg; vitamin B₆, 75 mg; vitamin E, 500 mg; niacin, 750 mg; pantothenic acid, 200 mg; biotin, 4 mg; iron, 1.5 g; selenium, 10 mg; copper, 300 g; zinc, 2.3 g; iodine, 20 mg; manganese, 2.4 g, Ca, 13.83%; AP, 3.33%; Lys, 2.17%; Met, 2.93%; salt, 5.67%;
^dThe amino acid content in this table refer to total amino acid levels

ISSN: 2049-1891