Table 3.

Growth performance of broiler chickens in the 7-d-experimental period (8 replicates per treatment unless otherwise stated).

	Basal diet	Protease A		Protease B		Protease C		Phytase
Supplementation	No	25	200	500	4000	200	1600	1500	Pooled	P-value
level	enzyme	mg/kg1	mg/kg	mg/kg	mg/kg2	mg/kg	mg/kg	FTU/kg	SEM	ANOVA
Final BW (g/bird)	692b,c	674c	690b,c	689b,c	670c	708b	702b	741a	9.0	<0.001
ADG (g/d)	40.9c,d	39.6d,e	40.8c–e	41.3b–d	38.5e	41.9b,c	43.0b	46.3a	0.78	<0.001
ADFI (g/d)	72.9b,c	72.8b,c	71.6c,d	72.5b,c	69.3d	74.9a,b	70.8c,d	77.8a	1.19	<0.001
G:F (g/g)	0.560b,c	0.545c	0.570b	0.570b	0.557b,c	0.559b,c	0.609a	0.595a	0.010	<0.001

^a–eValues without a common superscript within 1 row are significantly different (P < 0.050).

¹7 replicates.

²6 replicates.