Table 6.

Performance of broiler chickens from d 0 to 35 in response to different rearing methods and dietary protein level.

Rearing method	CP level	BWG (g)	FI (g)	FCR
Male	SCP	2,608a	3,835	1.471
	RCP	2,397b	3,672	1.533
Female	SCP	2,263c	3,481	1.538
	RCP	2,204c	3,471	1.576
Mix	SCP	2,452b	3,687	1.504
	RCP	2,254c	3,502	1.553
Main effects
Rearing method
Female		2,234	3,476c	1.557a
Male		2,502	3,753a	1.502 c
Mix		2,353	3,594b	1.529b
CP level
RCP		2,285	3,548b	1.554 a
SCP		2,441	3,667a	1.504b
P-value
Rearing method	< 0.001	< 0.001	< 0.001
CP level	< 0.001	0.001	< 0.001
Rearing method × CP level	< 0.010	0.065	0.548

Abbreviations: BWG, body weight gain per bird; CP, crude protein; FI, feed intake per bird; FCR, feed conversion ratio; RCP, reduced protein; SCP, standard protein.

^a,b,cMeans in a column not sharing the same superscripts are significantly different according to Tukey test (P < 0.05).