Table 3.

Dietary phytic acid remaining and hydrolysed after hydrolysis in the gizzard, jejunum and ileum (g/kg dry matter) in 28-d-old broilers fed diets containing either high or low susceptible phytate, supplemented with either 0 or 500 FTU/kg phytase (FTU = the quantity of phytase which liberates 1 μmol of inorganic phosphorus per minute from an excess of sodium phytate at 37 °C and pH of 5.5).¹

Item	Phytate status	High2		Low3		SEM	Susceptibility			Phytase			P-value
		0 FTU/kg	500 FTU/kg	0 FTU/kg	500 FTU/kg		High2	Low3	SEM	0 FTU/kg	500 FTU/kg	SEM	Susceptibility	Phytase	Susceptibility × phytase
Gizzard	Remaining	7.37	6.62	4.43	4.96	0.24	6.99a	6.24b	0.27	6.88a	6.35b	0.19	0.004	0.039	0.381
	Hydrolysed	5.50	6.02	4.43	4.96	0.30	5.76a	4.70b	0.38	4.96b	5.49a	0.19	<0.001	0.037	0.996
Jejunum	Remaining	6.82	5.80	6.23	5.97	0.19	6.31	6.10	0.07	6.52	5.89	0.22	0.535	0.064	0.259
	Hydrolysed	6.05	6.85	4.59	5.06	0.44	6.45a	4.83b	0.57	5.32	5.95	0.22	<0.001	0.064	0.624
Ileum	Remaining	5.40	4.61	5.22	4.91	0.15	5.01	5.07	0.02	5.31	4.76	0.20	0.853	0.101	0.468
	Hydrolysed	7.46	8.04	5.58	6.13	0.49	7.75a	5.86b	0.67	6.53	7.08	0.20	<0.001	0.100	0.639

^a,b Values within a row with different superscripts differ significantly at P < 0.05.

¹Diets containing either high or low susceptible phytate supplemented with either 0 or 500 FTU/kg phytase.

²High = diet with susceptible phytate content of approximately 8.54 g/kg (57.90% of total dietary phytic acid).

³Low = diet with susceptible phytate content of approximately 5.77 g/kg (46.33% of total dietary phytic acid).