TABLE 4.

Effect of rearing temperature and feed restriction on Cobb 500 male broiler chicken’s performance.¹

	Treatments2			Statistics
Item3	CTL	CHS	PF	SEM4	P-value5
Body weight (g)
Day 0	38.37	38.28	38.59	0.19	0.523
Day 28	1839.54	1812.25	1828.44	17.16	0.537
Day 42	3701.42	3215.29	3381.62	28.88	<0.001
Day 0–28
ADFI, g	87.57	87.47	87.66	0.71	0.982
ADG, g	64.32	63.35	63.92	0.61	0.537
FCR	1.36	1.38	1.37	0.01	0.112
Day 29–42
ADFI, g	216.09a	181.95b	183.67b	2.31	<0.001
ADG, g	132.99a	100.68c	110.03b	1.86	<0.001
FCR	1.62b	1.81a	1.66b	0.02	<0.001
Day 0–42
ADFI, g	128.32a	117.43b	118.10b	0.91	<0.001
ADG, g	87.21a	75.79c	79.29b	0.71	<0.001
FCR	1.47b	1.55a	1.48b	0.01	<0.001

^a–cIn each row, means with different letters are significantly different (P < 0.05).

¹Data represent the mean value of eight replicate pens of 28 birds/pen (n = 8).

²Treatments include: (1) control (CTL): birds raised under normal temperature (23°C) from day 29 to 42 and had free access to the diet; (2) cyclic heat stress (CHS): birds exposed to high temperatures (8 h/day at 35°C; from 9:30 am to 5:30 pm) from day 29 to 42 and had free access to the diet; (3) pair-fed (PF): birds raised under the same condition as CTL group, but fed the same amount of feed as CHS group from day 29 to 42.

³ADFI, average daily feed intake; ADG, average daily gain; FCR, feed conversion ratio.

⁴SEM: pooled standard error of means.

⁵P-value: based on one-way ANOVA.