Table 8.

Inositol phosphate ester content of the excreta of broilers fed diets adequate or deficient in aP and Ca, with zero, 500, or 1,500 FTU/kg phytase, for 21 days.

		mg/g DM
Total tract		IP61	IP5	IP41	IP3	Inositol
		Simple effect means
Negative control (NC)		35.6	3.60	1.83	0.17	1.21
NC + 500 FTU/kg		20.4	4.14	4.18	0.22	1.41
NC + 1,500 FTU/kg		12.9	3.14	7.05	0.24	1.46
Positive control (PC)		39.5	4.70	3.04	0.24	0.37
PC + 500 FTU/kg		20.7	4.76	4.93	0.18	0.89
PC + 1,500 FTU/kg		8.8	2.73	7.30	0.26	1.32
SEM		1.687	0.173	0.389	0.010	0.130
		Main effect means
aP, %	0.35	22.92	3.63	4.35	0.21	1.36
	0.50	23.01	4.07	5.09	0.23	0.86
SEM		0.974	0.100	0.225	0.006	0.075
Phytase2	0	37.55	4.15	2.43	0.21	0.79
	500	20.55	4.45	4.55	0.20	1.15
	1,500	10.81	2.94	7.17	0.25	1.39
SEM		1.193	0.12	0.275	0.007	0.092
		P-values for main effects
aP, %		0.715	0.004	<0.001	0.033	<0.001
Phytase		<0.001	<0.001	<0.001	<0.001	<0.001
aP × phytase		0.162	<0.001	0.018	<0.001	0.034
		P-values for orthogonal contrasts
Phytase quadratic		0.055	<0.001	<0.001	0.067	0.357
PC linear			<0.001	<0.001	0.077	<0.001
PC quadratic			0.002	0.060	<0.001	0.212
NC linear			0.016	<0.001	<0.001	0.231
NC quadratic			0.003	<0.001	0.110	0.485

¹Log transformation of IP4 and IP6 prior to analysis.

²FTU/kg.

8 replications per diet.

IP6-3: Inositol phosphate ester with 6- 3 bound phosphate molecules.