Effect of different dietary protein levels and amino acids supplementation patterns on growth performance, carcass characteristics and nitrogen excretion in growing-finishing pigs

Zhao, Yumei; Tian, Gang; Chen, Daiwen; Zheng, Ping; Yu, Jie; He, Jun; Mao, Xiangbing; Huang, Zhiqing; Luo, Yuheng; Luo, Junqiu; Yu, Bing

doi:10.1186/s40104-019-0381-2

Journal of Animal Science and Biotechnology

Table 6 Nitrogen balance of growing-finishing pigs fed low protein diet supplemented with different amino acids (n = 6)

From: Effect of different dietary protein levels and amino acids supplementation patterns on growth performance, carcass characteristics and nitrogen excretion in growing-finishing pigs

Item	HCP	MCP (− 2 %)	LCP(− 4 %)					P ₁	P ₂
Item	10 EAAs	10 EAAs	10 EAAs	Lys, Met,Thr, Trp	Lys, Met,Thr, Trp, Ile	Lys, Met,Thr, Trp, Val	Lys, Met,Thr, Trp, Ile, Val	P ₁	P ₂
PhaseI (25–50 kg)
N intake, g/d	53.00 ± 3.00^x	48.23 ± 2.25^x	40.72 ± 0.62^yab	40.42 ± 3.06^ab	34.40 ± 2.43^b	42.97 ± 2.64^a	41.04 ± 1.16^ab	< 0.01	0.08
FN, g/d	6.56 ± 0.45^x	6.32 ± 0.42^x	4.79 ± 0.57^y	5.67 ± 0.57	4.50 ± 0.42	5.92 ± 0.64	5.32 ± 0.11	0.04	0.27
UN, g/d	10.12 ± 1.44^x	7.28 ± 0.92^x	4.04 ± 0.52^y	6.87 ± 0.90	5.26 ± 1.20	4.82 ± 0.84	5.40 ± 0.88	< 0.01	0.28
TN, g/d	16.69 ± 1.35^x	13.60 ± 1.20^x	8.83 ± 0.62^yb	12.52 ± 1.05^a	9.76 ± 1.17^ab	10.74 ± 0.90^ab	10.72 ± 0.86^ab	< 0.01	0.09
RN, g/d	36.32 ± 2.44	34.62 ± 1.54	31.88 ± 0.93^a	27.90 ± 2.16^ab	24.64 ± 1.81^b	32.23 ± 3.02^a	30.31 ± 1.59^ab	0.23	0.73
N retention, %	68.42 ± 1.99^y	71.94 ± 1.65^y	78.26 ± 1.60^xa	69.02 ± 0.96^b	71.73 ± 2.26^ab	74.23 ± 3.37^ab	73.70 ± 2.35^ab	< 0.01	0.89
N ABV, %	78.22 ± 2.51^y	82.84 ± 1.76^xy	88.73 ± 1.47^xa	80.28 ± 1.77^b	82.83 ± 3.10^ab	86.69 ± 2.43^ab	84.70 ± 2.61^ab	< 0.01	0.13
Phase II (50–75 kg)
N intake, g/d	55.82 ± 2.32^x	45.71 ± 4.21^y	43.69 ± 0.58^ya	41.45 ± 1.03^ab	37.32 ± 2.96^b	43.10 ± 1.48^a	43.87 ± 1.93^a	< 0.01	0.09
FN, g/d	8.53 ± 1.18	7.07 ± 0.71	6.62 ± 0.38	7.17 ± 0.36	5.70 ± 0.60	7.04 ± 0.59	6.65 ± 0.64	0.26	0.34
UN, g/d	11.53 ± 1.89^x	7.56 ± 1.20^xy	5.98 ± 0.59^y	6.12 ± 0.72	6.23 ± 0.41	7.49 ± 1.23	7.28 ± 0.72	0.03	0.53
TN, g/d	20.06 ± 2.71^x	14.62 ± 1.57^xy	12.59 ± 0.43^y	13.29 ± 0.59	11.93 ± 0.61	14.53 ± 1.24	13.93 ± 1.23	0.03	0.20
RN, g/d	35.75 ± 2.73	31.06 ± 3.41	31.10 ± 0.85	28.16 ± 1.00	25.39 ± 2.48	28.58 ± 2.51	29.95 ± 1.82	0.32	0.29
N retention, %	64.21 ± 4.19	67.68 ± 2.46	71.12 ± 1.20	67.89 ± 1.34	69.53 ± 1.48	65.71 ± 3.97	68.16 ± 2.45	0.27	0.60
N ABV, %	75.54 ± 4.02	80.13 ± 2.85	83.84 ± 1.64	82.19 ± 1.92	79.67 ± 1.93	78.57 ± 4.12	80.20 ± 2.13	0.17	0.60
Phase III (75–100 kg)
N intake, g/d	67.57 ± 1.57^x	55.85 ± 2.94^y	49.04 ± 1.65^z	45.51 ± 0.96	47.42 ± 3.05	47.18 ± 2.80	47.11 ± 3.77	< 0.01	0.92
FN, g/d	6.53 ± 0.37^x	5.71 ± 0.52^xy	5.12 ± 0.35^y	5.43 ± 0.43	4.86 ± 0.45	4.50 ± 0.31	4.94 ± 0.37	0.07	0.54
UN, g/d	17.49 ± 3.58^x	14.18 ± 1.0^xy	9.62 ± 0.98^y	10.82 ± 1.68	9.79 ± 1.04	10.71 ± 2.15	10.80 ± 1.83	0.08	0.96
TN, g/d	24.02 ± 3.80^x	19.89 ± 1.10^xy	14.74 ± 1.13^y	16.25 ± 1.73	14.65 ± 1.39	15.20 ± 2.27	15.74 ± 2.05	0.05	0.96
RN, g/d	43.54 ± 2.69^x	35.96 ± 2.13^y	34.30 ± 1.47^y	29.26 ± 1.54	32.76 ± 3.58	31.97 ± 2.00	31.37 ± 2.50	0.02	0.68
N retention, %	64.86 ± 4.73	64.33 ± 1.18	69.96 ± 1.92	64.40 ± 3.58	67.68 ± 5.06	68.22 ± 3.74	66.81 ± 2.81	0.41	0.86
N ABV, %	71.78 ± 5.60	71.67 ± 1.45	78.06 ± 1.90	73.13 ± 4.04	75.36 ± 4.73	75.43 ± 4.23	74.88 ± 3.03	0.35	0.92
Phase IV (100–125 kg)
N intake, g/d	63.49 ± 2.62^x	50.22 ± 1.71^y	43.62 ± 1.40^z	44.61 ± 1.66	44.24 ± 1.89	44.34 ± 1.85	40.38 ± 4.96	< 0.01	0.77
FN, g/d	5.21 ± 2.09	5.11 ± 2.70	4.14 ± 1.21	4.66 ± 2.02	4.89 ± 1.55	4.91 ± 2.42	4.16 ± 0.75	0.18	0.69
UN, g/d	25.59 ± 0.48^x	15.71 ± 0.36^y	10.08 ± 0.42^y	11.14 ± 0.44	9.89 ± 0.54	10.71 ± 0.40	11.69 ± 0.71	< 0.01	0.95
TN, g/d	30.80 ± 2.15^x	20.82 ± 3.02^y	14.22 ± 1.09^z	15.80 ± 1.93	14.77 ± 1.12	15.62 ± 2.67	15.85 ± 0.80	< 0.01	0.95
RN, g/d	32.69 ± 2.03	29.40 ± 4.46	29.40 ± 1.55	28.80 ± 2.42	29.46 ± 1.41	28.73 ± 3.23	24.52 ± 4.64	0.62	0.73
N retention, %	51.55 ± 2.65^y	57.63 ± 7.82^xy	67.33 ± 2.37^x	64.40 ± 4.24	66.67 ± 2.01	64.53 ± 6.36	57.67 ± 6.55	0.07	0.64
N ABV, %	56.18 ± 3.06^y	63.88 ± 8.19^xy	74.44 ± 2.84^x	71.98 ± 4.99	75.38 ± 3.55	72.35 ± 6.68	64.32 ± 7.62	0.05	0.65

FN, Fecal nitrogen; UN, Urine nitrogen; TN, Total nitrogen; RN, Retained nitrogen; ABV, Apparent biological value.
P₁ represented the P value of ANOVA among the HCP diet, MCPdiet and LCP diet with balancing 10 EAAs.
P₂ represented the P value of ANOVA among different amino acid balanced patterns of the LCP diets groups.
^a,bSuperscripts indicated differences among different amino acid balanced patterns of LCP diets groups.
^x,y,zSuperscripts indicate differences among different levels of dietary protein

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ISSN: 2049-1891

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