Table 2.

Effect of dietary phytase, inositol and phosphorus (P) content on broiler feed intake, weight gain and FCR from d 0 to 42.¹

Item2	Inositol, g/kg		Phytase, FTU/kg	Week 1 (0 to 7 d)			Week 3 (0 to 21 d)			Week 6 (0 to 42 d)
				Intake, g	Gain, g	FCR, g/g	Intake, g	Gain, g	FCR, g/g	Intake, g	Gain, g	FCR, g/g
P level
Low	0		0	101	131	0.77	1,009	730	1.38	3,934	2,134	1.84
Low	3		0	105	130	0.81	955	720	1.33	3,957	2,191	1.81
Low	0		1,500	105	140	0.75	1,044	813	1.28	4,065	2,304	1.76
Low	3		1,500	108	143	0.75	1,085	837	1.30	4,134	2,354	1.76
Medium	0		0	103	135	0.76	1,056	797	1.33	4,203	2,325	1.81
Medium	3		0	104	136	0.76	1,067	805	1.32	4,082	2,293	1.78
Medium	0		1,500	109	142	0.77	1,072	819	1.31	4,066	2,313	1.76
Medium	3		1,500	110	143	0.77	1,053	811	1.30	4,067	2,290	1.78
High	0		0	105	133	0.79	1,059	789	1.34	4,143	2,315	1.79
High	3		0	104	135	0.77	1,056	797	1.32	4,082	2,289	1.78
High	0		1,500	100	141	0.71	1,054	813	1.30	4,057	2,322	1.75
High	3		1,500	100	138	0.72	1,031	808	1.28	4,078	2,325	1.76
LSD 5%				11	10	0.043	46	31	0.03	74	41	0.017
Low				105	136	0.77	1,023	775	1.32	4,023	2,246	1.79
Medium				107	139	0.77	1,062	808	1.31	4,104	2,305	1.78
High				102	137	0.75	1,050	802	1.31	4,090	2,313	1.77
LSD 5%				6	5	0.021	23	15	0.015	64	35	0.015
		0		104	137	0.76	1,049	794	1.32	4,078	2,286	1.79
		3		105	137	0.76	1,041	796	1.31	4,067	2,291	1.78
LSD 5%				5	4	0.018	19	13	0.012	52	29	0.012
			0	104	133	0.78	1,033	773	1.34	4,067	2,258	1.80
			1,500	105	141	0.74	1,056	817	1.29	4,078	2,318	1.76
LSD 5%				5	4	0.018	19	13	0.012	52	29	0.012
P-value
P level				0.264	0.403	0.063	0.004	0.000	0.237	0.029	0.001	0.009
Inositol				0.568	0.816	0.460	0.412	0.690	0.016	0.671	0.732	0.125
P level × Inositol				0.715	0.891	0.439	0.921	0.914	0.568	0.260	0.062	0.249
Phytase				0.479	0.000	0.001	0.016	0.000	0.000	0.686	0.000	0.000
P level × Phytase				0.144	0.486	0.008	0.000	0.000	0.017	0.001	0.000	0.029
Inositol × Phytase				0.918	0.974	0.915	0.427	0.913	0.126	0.116	0.730	0.014
Inositol × Phytase × P level				0.960	0.609	0.197	0.013	0.208	0.019	0.843	0.885	0.547

FCR = feed conversion ratio (feed intake: body weight gain); LSD = least significant difference.

¹Means represent the average response of 9 replicate pens (198 chicks) per treatment.

²Low, medium and high P levels were set as 3.2, 4.8 and 6.0 g/kg for starter, and 2.2, 3.8 and 5.0 g/kg for finisher phases, respectively.