Table 6.

Effect of xylanase, protease and superdosing phytase on carcass and breast weight and yield of broilers at 42 days of age.¹

Treatment		Live weight, g	Carcass, g	Carcass, %	Breast, g	Breast, %
CON		2,679	2,079	77.59	639	30.75
XYL		2,706	2,114	78.14	657	31.06
PRO		2,699	2,112	78.24	650	30.74
PHY		2,691	2,107	78.31	662	31.42
XYL + PRO		2,687	2,119	78.84	643	30.32
XYL + PHY		2,709	2,150	79.36	685	31.90
PRO + PHY		2,670	2,111	79.05	647	30.64
ALL		2,713	2,149	79.24	663	30.84
Std dev		46	46	1.25	32	1.30
XYL	+	2,704	2,133a	78.90	662	31.03
	−	2,685	2,102b	78.30	650	30.89
PRO	+	2,692	2,123	78.84	651	30.64
	−	2,696	2,113	78.35	661	31.28
SD PHY	+	2,696	2,129	78.99a	664a	31.20
	−	2,693	2,106	78.20b	647b	30.72
P-value
XYL		0.143	0.012	0.070	0.123	0.669
PRO		0.753	0.402	0.133	0.190	0.052
SD PHY		0.826	0.055	0.019	0.039	0.148
XYL × PRO		0.796	0.496	0.533	0.319	0.442
XYL × SD PHY		0.368	0.416	0.945	0.377	0.552
PRO × SD PHY		0.723	0.462	0.575	0.294	0.413
XYL × PRO × SD PHY		0.222	0.613	0.484	0.596	0.732

CON = control; XYL = xylanase; PRO = protease; PHY = phytase; SD PHY = superdosing phytase.

^a,b Means within the same column with different superscripts are different (P < 0.05).

¹Means represent 2 birds per replicate pen and 7 replicates per treatment.