Table 3.

Analyzed enzyme activities in feed samples.

Treatments1	Expected		Broilers		Turkeys
	Phytase, FTU/kg	Xylanase, BXU/kg	Phytase,2 FTU/kg	Xylanase,3 BXU/kg	Phytase, FTU/kg	Xylanase, BXU/kg
1	500	0	750	<2,000	954	<2,000
2	500	16,000	865	16,100	994	16,100
3	1,500	0	1,190	<2,000	2,880	<2,000
4	1,500	16,000	2,250	14,300	1,840	15,000
5	3,000	0	2,720	<2,000	3,790	<2,000
6	3,000	16,000	3,930	17,400	2,460	13,300

¹Diets consisted in 6 experimental treatments: (1) diet containing standard dose of phytase without xylanase; (2) diet containing standard dose of phytase with xylanase; (3) diet containing superdosing of phytase without xylanase; (4) diet containing superdosing with xylanase; (5) diet containing megadosing of phytase without xylanase; (6) diet containing megadosing with xylanase.

²One FTU is defined as the amount of enzyme required to release 1 μmol of inorganic P per minute from sodium phytate at 37°C and pH 5.5.

³One BXU is defined as the amount of enzyme that produces 1 nmol reducing sugars from birchwood xylan in one second at 50°C and pH 5.3.