Table 2.

Effect of the feeding program, genetic line and period of the day on the feed intake and NE intake by hour of growing and finishing pigs¹

Feeding Programs2	CON		HF/LP		SEQ		Line A		Line B			Statistical Analysis4
Period of day	22 ºC	30 ºC	22 ºC	30 ºC	22 ºC	30 ºC	22 ºC	30 ºC	22 ºC	30 ºC	RSD3	FP	GL	TP	FP×GL	FP×TP	GL×TP	FP×GL×TP
No. of animals	24	24	23	23	26	26	37	37	36	36
Growing phase 1
Feed intake, g/h	68.46	64.63	65.46	72.26	67.88	78.27	67.74	66.77	66.80	76.67	6.49	0.09	0.12	0.06	0.77	0.06	0.03	0.45
NE intake, MJ/h	0.61	0.55	0.65	0.72	0.60	0.79	0.64	0.61	0.62	0.74	3.38	<0.01	0.13	<0.01	0.64	<0.01	0.02	0.40
Growing phase 2
Feed intake, g/h	77.95	79.93	81.32	91.62	89.29	83.02	81.49	66.44	84.22	103.27	3.02	0.23	<0.01	0.69	0.84	0.32	<0.01	0.11
NE intake, MJ/h	0.71	0.74	0.82	0.93	0.81	0.88	0.77	0.64	0.79	1.00	2.78	0.01	<0.01	0.29	0.74	0.66	<0.01	0.42
Finishing phase
Feed intake, g/h	102.19	87.44	106.13	95.38	89.29	108.58	97.18	77.76	91.39	126.34	5.71	0.60	<0.01	0.16	0.85	0.07	<0.01	0.50
NE intake, MJ/h	0.93	0.78	1.07	0.96	0.80	1.09	0.91	0.75	0.86	1.27	6.31	0.14	<0.01	0.02	0.89	<0.01	<0.01	0.54
Total experiment
Feed intake, g/h	82.59	78.06	84.31	86.42	82.17	89.97	82.20	70.39	80.82	102.27	5.08	0.12	<0.01	0.08	0.71	0.70	<0.01	0.65
NE intake, MJ/h	0.77	0.70	0.84	0.87	0.74	0.90	0.77	0.68	0.76	1.00	4.98	<0.01	<0.01	<0.01	0.75	0.09	<0.01	0.32

¹Initial weight as a covariate was significant for all variables; P < 0.01.

²CON: control diet from 0000 to 2359 h; HF/LP: high-fat/low-crude protein diet from 0000 to 2359 h; sequential feeding (SEQ): 1800 to 1000 h control diet and 1001 to 1759 h high-fat/low-crude protein diet.

³Residual Standard Deviation.

⁴Data were analyzed using a linear MIXED model including the fixed effects of covariate, feeding program (FP; n=3), genetic line (GL; n=2), time period of the day (TP; n=2), the interaction between FP and GL (FP×GL), FP and PD (FP×TP), GL and PD (GL×TP) and the triple interaction FP×GL×TP.