Table 3.

Growth performance of growing-finishing pigs fed low protein diet supplemented with different amino acids (n = 6)

Item	HCP	MCP (−2, %)	LCP(− 4, %)					P 1	P 2
	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
Phase I (25–50, kg)
Initial weight, kg	25.4 ± 0.7	25.5 ± 0.8	25.4 ± 0.5	25.5 ± 0.6	25.4 ± 0.7	25.4 ± 0.5	25.8 ± 0.8	0.94	0.98
Final weight, kg	51.5 ± 0.7	51.8 ± 0.6	50.5 ± 2.0abc	47.4 ± 2.0c	48.3 ± 1.1bc	52.0 ± 0.9ab	52.3 ± 0.6a	0.56	0.05
ADFI, g	1641 ± 55	1607 ± 60	1573 ± 43bc	1550 ± 112bc	1461 ± 86c	1795 ± 56a	1715 ± 22ab	0.68	0.02
ADG, g	791 ± 33	808 ± 29	761 ± 18ab	665 ± 44b	691 ± 44b	801 ± 26a	813 ± 13a	0.49	< 0.01
F/G	2.09 ± 0.07	1.99 ± 0.05	2.07 ± 0.02b	2.33 ± 0.06a	2.12 ± 0.06b	2.23 ± 0.08ab	2.11 ± 0.04b	0.37	0.02
Phase II (50–75, kg)
Initial weight, kg	51.5 ± 0.7	51.8 ± 0.6	50.5 ± 2.0abc	47.4 ± 2.0c	48.3 ± 1.1bc	52.0 ± 0.9ab	52.3 ± 0.6a	0.56	0.05
Final weight, kg	75.8 ± 1.8	77.0 ± 1.9	76.0 ± 1.5	77.0 ± 2.3	71.7 ± 2.7	76.8 ± 1.6	76.0 ± 1.2	0.92	0.10
ADFI, g	2132 ± 46	2076 ± 146	2351 ± 77	2280 ± 63	2155 ± 106	2306 ± 96	2307 ± 62	0.15	0.53
ADG, g	866 ± 32	844 ± 56	908 ± 43	842 ± 24	838 ± 31	883 ± 34	860 ± 28	0.58	0.51
F/G	2.48 ± 0.08	2.47 ± 0.08	2.63 ± 0.18	2.71 ± 0.05	2.57 ± 0.06	2.62 ± 0.13	2.69 ± 0.05	0.61	0.90
Phase III (75–100, kg)
Initial weight, kg	75.8 ± 1.8	77.0 ± 1.9	76.0 ± 1.5	77.0 ± 2.3	71.7 ± 2.7	76.8 ± 1.6	76.0 ± 1.2	0.92	0.10
Final weight, kg	103.2 ± 2.6	103.9 ± 2.6	104.1 ± 2.1	99.4 ± 2.7	101.7 ± 2.6	102.4 ± 2.9	104.0 ± 1.6	0.60	0.60
ADFI, g	2734 ± 142	2699 ± 143	2703 ± 67	2949 ± 104	2703 ± 140	2709 ± 101	2753 ± 93	0.97	0.41
ADG, g	932 ± 50	902 ± 36	938 ± 34ab	947 ± 43ab	1000 ± 18a	856 ± 52b	914 ± 22ab	0.80	0.06
F/G	2.94 ± 0.07	2.99 ± 0.13	2.90 ± 0.11ab	3.13 ± 0.08a	2.71 ± 0.15b	3.20 ± 0.16a	3.01 ± 0.11ab	0.81	0.07
Phase IV(100–125, kg)
Initial weight, kg	103.2 ± 2.6	103.9 ± 2.6	104.1 ± 2.1	99.4 ± 2.7	101.7 ± 2.6	102.4 ± 2.9	104.0 ± 1.6	0.60	0.60
Final weight, kg	123.9 ± 3.2	123.6 ± 3.3	122.8 ± 3.2	118.8 ± 3.4	123.2 ± 3.1	122.3 ± 3.1	120.7 ± 2.1	0.97	0.87
ADFI, g	3080 ± 145	2866 ± 117	3049 ± 135	3146 ± 109	3083 ± 105	3104 ± 103	2829 ± 210	0.52	0.54
ADG, g	958 ± 62	937 ± 68	889 ± 57ab	926 ± 52ab	1022 ± 47a	946 ± 53ab	798 ± 38 b	0.95	0.08
F/G	3.25 ± 0.16	3.1 ± 0.21	3.28 ± 0.08ab	3.42 ± 0.10a	3.03 ± 0.10b	3.31 ± 0.13ab	3.53 ± 0.14a	0.70	0.04
Overall (25–125, kg)
Initial weight, kg	25.4 ± 0.7	25.5 ± 0.8	25.4 ± 0.5	25.5 ± 0.6	25.4 ± 0.7	25.4 ± 0.5	25.8 ± 0.8	0.94	0.98
Final weight, kg	123.9 ± 3.2	123.6 ± 3.3	122.8 ± 3.2	118.8 ± 3.4	123.2 ± 3.1	122.3 ± 3.1	120.7 ± 2.1	0.97	0.87
ADFI, g	2326 ± 77	2270 ± 108	2347 ± 53	2406 ± 74	2271 ± 95	2413 ± 46	2351 ± 76	0.91	0.43
ADG, g	879 ± 22	876 ± 37	877 ± 25	833 ± 29	872 ± 21	865 ± 28	856 ± 11	0.99	0.72
F/G	2.64 ± 0.05	2.60 ± 0.10	2.63 ± 0.04bc	2.88 ± 0.04a	2.58 ± 0.07c	2.80 ± 0.08ab	2.75 ± 0.08ab	0.89	0.01

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,b,cSuperscripts indicated differences among different amino acid balanced patterns of LCP diets groups