Table 3.

The effects of lowering dietary crude protein and adding synthetic amino acids on growth performance

	Diet1			MSE	P	Linear P	Quadratic P
	Control	1X	2X
Pig BW, kg
Day 0	6.2279	6.2049	6.1940	0.69083	0.9920	0.8655	0.9720
Day 7	7.4290	7.5525	7.4520	0.7717	0.8407	0.9182	0.5635
Day 14	9.9027	10.1917	9.8726	0.8781	0.3865	0.9059	0.1712
Day 28	16.8821	17.3940	16.8208	1.1783	0.1891	0.8577	0.0704
Day 42	26.4495a	26.7025a	25.1492b	1.7250	0.0059	0.0114	0.0405
Day 63	43.8239a	42.6060a	40.7084b	2.4695	0.0002	<0.0001	0.5840
Day 84	64.8898a	64.4769a	61.1584b	2.9240	<0.0001	<0.0001	0.0515
Day 105	87.1706a	86.9978a	83.2905b	3.2197	<0.0001	<0.0001	0.0320
Day 126	108.6599a	110.1645a	105.7972b	3.3309	0.0001	0.0042	0.0008
Mkt	129.019a	129.032a	125.080b	3.9212	0.0008	0.0008	0.0527
ADG, kg
Days 0–7	0.1715	0.1925	0.1797	0.0410	0.2123	0.4950	0.1050
Days 7–14	0.3533b	0.3770a	0.3458b	0.0362	0.0111	0.4708	0.0036
Days 14–28	0.4985	0.5144	0.4962	0.0322	0.1126	0.8117	0.0386
Days 28–42	0.6833a	0.6648a	0.5928b	0.0507	0.0012	0.2416	<0.0001
Days 42–63	0.8273a	0.7573b	0.7409b	0.0500	<0.0001	<0.0001	0.0359
Days 63–84	1.0031b	1.0351a	0.9738c	0.0409	<0.0001	0.0258	<0.0001
Days 84–105	1.0609	1.0724	1.0539	0.0599	0.5611	0.6838	0.3215
Days 105–126	1.0233b	1.1031a	1.0717a	0.0682	0.0006	0.0168	0.0018
Days 126–mkt2	1.2428a	1.1468b	1.1715b	0.1020	0.0052	0.0140	0.0182
Nursery, Days 0–42	0.4814a	0.4880a	0.4513b	0.0296	0.0001	0.0008	0.0049
Grower, Days 42–105	0.9638a	0.9570a	0.9229b	0.0337	0.0002	<0.0001	0.1087
Finisher, Days 105–mkt	1.1188	1.1159	1.1157	0.0563	0.9804	0.7828	0.7771
Overall, Days 0–mkt	0.8619a	0.8621a	0.8344b	0.0254	0.0003	0.0004	0.0361
ADFI, kg
Days 0–7	0.1777	0.1970	0.1887	0.0283	0.0679	0.1804	0.0563
Days 7–14	0.4173	0.4363	0.4107	0.0552	0.2558	0.6790	0.1110
Days 14–28	0.7202b	0.7627a	0.6612c	0.0601	<0.0001	0.0012	<0.0001
Days 28–42	1.0895ab	1.1062a	1.0470b	0.0866	0.0584	0.0945	0.0848
Days 42–63	1.6792a	1.6016b	1.6490a	0.0977	0.0272	0.5607	0.0101
Days 63–84	2.2954	2.3035	2.2992	0.1293	0.9689	0.6471	0.9807
Days 84–105	2.8462	2.9022	2.8997	0.1934	0.4573	0.5642	0.7021
Days 105–126	3.2424b	3.3673a	3.3357ab	0.1749	0.0448	0.0762	0.0747
Days 126–mkt	3.1215	3.1348	3.1602	0.1694	0.7251	0.4319	0.8875
Nursery, days 0–42	0.6797a	0.7057a	0.6704b	0.0446	0.0228	0.0124	0.0003
Grower, days 42–105	2.2782	2.2673	2.2915	0.1101	0.7484	0.6774	0.5256
Finisher, days 105–mkt	3.1964	3.2948	3.2548	0.1371	0.2426	0.1977	0.2769
Overall, days 0–mkt	2.0487	2.0709	2.0618	0.0814	0.6383	0.5785	0.4445
Gain:feed
Days 0–7	0.9562	0.9705	0.9538	0.1199	0.8742	0.6821	0.7530
Days 7–14	0.8546	0.8669	0.8109	0.0896	0.0871	0.9214	0.7478
Days 14–28	0.6980b	0.6892b	0.7701a	0.0647	<0.0001	0.0003	0.0073
Days 28–42	0.6293a	0.6039a	0.5725b	0.0507	0.0012	0.0003	0.8120
Days 42–63	0.4921a	0.4744b	0.4472c	0.0253	<0.0001	<0.0001	0.6234
Days 63–84	0.4380b	0.4530a	0.4250c	0.0242	0.0012	0.0355	0.0006
Days 84–105	0.3726	0.3710	0.3646	0.0248	0.4699	0.2486	0.6796
Days 105–126	0.3162	0.3285	0.3225	0.0259	0.2662	0.4083	0.1612
Days 126–mkt	0.3938a	0.3662b	0.3710b	0.0287	0.0046	0.0027	0.0192
Nursery, day 0–42	0.6873	0.6731	0.6786	0.0314	0.2927	0.3387	0.2139
Grower, day 42–105	0.4237a	0.4208a	0.4033b	0.0155	<0.0001	<0.0001	0.0286
Finisher, day 105–mkt	0.3502	0.3440	0.3432	0.0203	0.4308	0.2102	0.5623
Overall, day 0–mkt	0.4210a	0.4143a	0.4051b	0.0122	0.0001	0.0001	0.3238

Values with different superscripts, within a row are different (P < 0.05)