Table 5.

Effect of diets containing different levels of phytase, xylanase, and β-glucanase on jejunual protein concentration (mg/g tissue) and enzyme activities (μmol/mg protein/min) in jejunum (10 days of age)

Phytase levels	Xylanase levels	β-glucanase levels	Protein	Maltase	Sucrase	AP	APP
None	None	None	53.9	0.68	0.06	0.56	4.10
	Optimum	None	56.0	0.72	0.07	0.59	3.40
	None	Optimum	53.8	0.66	0.06	0.56	3.60
	Optimum	Optimum	53.4	0.79	0.07	0.59	4.00
Low	None	None	53.7	0.79	0.09	0.70	4.80
	Optimum	None	51.7	0.80	0.11	0.73	4.50
	None	Optimum	60.5	0.71	0.08	0.57	3.80
	Optimum	Optimum	54.8	0.86	0.10	0.80	4.60
Superdose	None	None	58.9	0.82	0.10	0.74	3.70
	Optimum	None	55.8	0.80	0.11	0.86	3.80
	None	Optimum	55.6	0.85	0.13	0.89	3.70
	Optimum	Optimum	57.2	0.79	0.10	0.79	3.70
SEM			1.21	0.02	0.004	0.03	0.10
Main effects
None			54.3	0.72b	0.07c	0.58b	3.80b
Low			55.2	0.79b	0.09b	0.70ab	4.40a
Superdose			56.9	0.82a	0.11a	0.82a	3.70b
	None		56.1	0.75	0.09	0.67	4.00
	Optimum		54.8	0.79	0.09	0.73	4.00
		None	55.0	0.77	0.90	0.70	4.00
		Optimum	55.9	0.78	0.90	0.70	3.9
Source of variation
Phytase			0.70	0.05	0.001	0.001	0.005
Xylanase			0.63	0.26	0.23	0.27	0.92
β-Glucanase			0.73	0.82	0.93	0.93	0.46
Phytase × xylanase			0.74	0.24	0.10	0.54	0.79
Phytase × β-glucanase			0.53	0.90	0.28	0.86	0.51
Xylanase × β-glucanase			0.92	0.37	0.15	0.97	0.08
Phytase × xylanase × β-glucanase			0.77	0.51	0.26	0.23	0.35

Values are means of 6 replicates (one bird per cage).

AP, alkaline phosphatase; APP, aminopeptidase; SEM, standard error of means.

^a–cMean values with different superscripts within the columns are different (p<0.05).