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

Sun, Mingfa; Ma, Ning; Liu, Hui; Liu, Yu; Zhou, Yunlei; Zhao, Jingpeng; Wang, Xiaojuan; Li, Haifang; Ma, Baishun; Jiao, Hongchao; Lin, Hai

doi:10.1186/s40104-022-00719-x

Journal of Animal Science and Biotechnology

Table 5 Effect of the dietary arginine level in a low-protein diet on plasma biochemical indices¹

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

Item	Control²	Dietary arginine level in LP diet, %³					P-value
Item	Control²	0.80	0.85	0.90	0.95	1.00	Diet⁴	Linear⁵	Quadratic⁵
Week 4
ALT, U/L	13.2 ± 0.8	14.8 ± 1.1	14.3 ± 0.9	13.7 ± 0.9	14.6 ± 0.6	12.8 ± 0.5	0.504	0.207	0.739
AST, U/L	196.9 ± 14.7	183.7 ± 14.0	192.9 ± 12.4	168.4 ± 15.8	196.2 ± 5.8	175.7 ± 4.1	0.473	0.579	0.935
TP, μmol/L	54.8 ± 2.0^a	52.4 ± 2.0^abc	52.9 ± 1.6^abc	47.6 ± 1.7^bc	54.0 ± 1.7^ab	46.5 ± 3.1^c	0.041	0.176	0.806
Urea-N, mmol/L	1.70 ± 0.15^b	1.73 ± 0.06^b	1.73 ± 0.18^b	1.92 ± 0.14^b	2.57 ± 0.18^a	2.43 ± 0.16^a	0.001	< 0.001	0.720
Urate, μmol/L	136.1 ± 15.9^b	157.1 ± 11.9^ab	120.1 ± 8.2^b	106.2 ± 7.9^b	128.9 ± 19.0^b	189.4 ± 22.9^a	0.007	0.030	< 0.001
TAA, μg/mL	604.0 ± 34.8	659.1 ± 30.4	618.9 ± 26.8	616.3 ± 23.3	648.5 ± 42.5	611.6 ± 44.0	0.841	0.484	0.707
GLU, mmol/L	12.3 ± 0.3	12.6 ± 0.5	12.1 ± 0.5	11.1 ± 0.5	12.0 ± 0.5	12.3 ± 0.4	0.261	0.637	0.060
TG, mmol/L	11.4 ± 1.9	12.0 ± 1.8	9.94 ± 1.54	7.05 ± 0.97	10.7 ± 1.54	9.74 ± 0.78	0.225	0.491	0.085
TCHO, mmol/L	2.97 ± 0.64	2.46 ± 0.34	1.88 ± 0.22	1.66 ± 0.16	2.17 ± 0.23	1.99 ± 0.17	0.106	0.458	0.057
Week 8
ALT, U/L	13.1 ± 0.69	11.2 ± 0.96	11.0 ± 0.75	9.90 ± 0.41	10.5 ± 0.47	11.4 ± 0.65	0.056	0.969	0.142
AST, U/L	194.2 ± 8.6^a	184.0 ± 10.3^ab	171.4 ± 6.1^ab	163.5 ± 5.2^b	166.5 ± 4.7^b	185.3 ± 6.7^ab	0.031	0.925	0.010
TP, μmol/L	50.7 ± 1.5^b	54.0 ± 0.8^ab	54.6 ± 0.7^ab	54.9 ± 1.4^ab	54.0 ± 1.8^ab	57.1 ± 1.5^a	0.045	0.212	0.458
Urea-N, mmol/L	1.08 ± 0.08^b	1.17 ± 0.13^ab	0.99 ± 0.10^b	1.30 ± 0.13^ab	1.24 ± 0.23^ab	1.54 ± 0.12^a	0.001	0.043	0.302
Urate, μmol/L	122.0 ± 10.3^b	117.2 ± 11.2^b	126.0 ± 17.3^b	176.2 ± 24.7^a	142.1 ± 9.9^ab	166.3 ± 18.2^ab	0.048	0.031	0.355
TAA, μg/mL	698.3 ± 16.3	735.7 ± 20.1	766.4 ± 17.4	736.5 ± 26.1	748.8 ± 24.0	735.5 ± 23.1	0.368	0.779	0.589
GLU, mmol/L	11.8 ± 0.14^c	11.7 ± 0.19^c	12.1 ± 0.18^bc	13.0 ± 0.34^a	12.3 ± 0.23^abc	12.8 ± 0.31^ab	0.002	0.005	0.171
TG, mmol/L	7.89 ± 1.53	8.11 ± 1.24	7.42 ± 1.45	9.88 ± 1.40	9.51 ± 2.08	12.3 ± 1.47	0.265	0.046	0.580
TCHO, mmol/L	1.85 ± 0.24	2.02 ± 0.19	1.66 ± 0.20	2.02 ± 0.21	2.02 ± 0.25	2.43 ± 0.21	0.253	0.102	0.186

¹Data were presented as the mean ± SD (n = 15). Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), Total protein (TP), Urea, nitrogen (urea-N), urate, Total amino acids (TAA), glucose, Triglyceride (TG), Total cholesterol (TCHO)
²The control hens were fed a diet with 16% protein level
³The 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
⁴Diet = effect of all the dietary treatments
⁵Linear and quadratic = effect of dietary arginine from 0.80% to 1.00% treatments
^a-c: Means with different superscripts within the same column differ significantly, P < 0.05

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ISSN: 2049-1891

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