Table 5. Effects of dietary energy and crude protein levels on growth performance in growing-finishing pigs.

Energy	ME 13.40 MJ/kg			ME 13.82 MJ/kg			SEM	p-value
CP (%)	High	Middle	Low	High	Middle	Low		ME	CP	M × C
Body weight (kg)
Initial	30.97	30.95	30.97	30.95	30.95	30.95	0.854	-	-	-
3 wks	42.86	40.59	41.17	43.48	42.73	40.37	1.012	0.77	0.66	0.86
6 wks	63.03	62.26	62.64	66.92	63.66	59.77	1.369	0.78	0.57	0.63
9 wks	80.78	83.03	82.56	87.06	84.65	78.87	1.553	0.67	0.66	0.47
12 wks	100.19c	104.10b	102.78b	108.17a	106.05ab	99.62c	1.602	0.50	0.61	0.40
ADG (g)
0–3 wksL	567	459	486	597	561	448	19.4	0.38	0.04	0.29
4–6 wks	960	1,032	1,023	1,116	997	924	32.2	0.91	0.73	0.28
0–6 wks	763	745	754	857	779	686	18.7	0.59	0.14	0.19
7–9 wks	845	989	948	959	1,000	910	30.9	0.66	0.50	0.62
10–12 wks	924	1,003	963	1,005	1,019	988	16.9	0.26	0.53	0.71
7–12 wks	885	996	956	982	1,009	949	16.1	0.27	0.19	0.37
0–12 wks	824c	871b	855bc	919a	894ab	818c	12.2	0.24	0.23	0.07
ADFI (g)
0–3 wks	1,462	1,366	1,434	1,390	1,450	1,340	40.1	0.75	0.93	0.66
4–6 wks	2,280	2,304	2,490	2,350	2,378	2,164	12.3	0.51	0.97	0.15
0–6 wks	1,872	1,834	1,960	1,872	1,912	1,752	39.2	0.60	0.98	0.35
7–9 wks	2.674	2,770	3,032	2,786	2,798	2,620	60.2	0.46	0.81	0.19
10–12 wks	3,522	3,580	3,748	3,512	3,662	3,204	72.8	0.29	0.70	0.18
7–12 wks	3,100	3,176	3,390	3,150	3,230	2,910	63.8	0.33	0.88	0.17
0–12 wks	2,486	2,506	2,674	2,512	2,570	2,334	49.6	0.42	0.94	0.22
G:F ratio
0–3 wksL	0.390	0.340	0.340	0.434	0.388	0.338	0.0118	0.18	0.03	0.58
4–6 wks	0.426	0.448	0.408	0.478	0.422	0.422	0.0112	0.56	0.42	0.39
0–6 wksL	0.416	0.406	0.382	0.456	0.408	0.390	0.0083	0.18	0.02	0.52
7–9 wks	0.316	0.362	0.314	0.344	0.358	0.350	0.0094	0.31	0.38	0.67
10–12 wks	0.266	0.280	0.256	0.290	0.278	0.328	0.0973	0.12	0.80	0.30
7–12 wks	0.286	0.314	0.284	0.312	0.312	0.336	0.0073	0.09	0.71	0.33
0–12 wks	0.334	0.350	0.322	0.368	0.348	0.356	0.0046	0.01	0.43	0.13

^LLinear response (p < 0.05) to dietary CP levels when a significant CP effect was detected.

^a–cmeans with different superscripts in the same row differ significantly (p < 0.05).

CP, crude protein; ME, metabolizable energy; SEM, standard error of the mean; ADG, average daily gain; ADFI, average daily feed intake.