Table 2.

Effect of dietary phytase and sex on BW, BW gain, and G:F ratio in growing pigs during the fattening period

Dietary treatmenta	Con		Phy			P-valueb
Item	Gilts	Barrows	Gilts	Barrows	SEM	Phytase	Sex	Phytase × Sex
Body weight, kg
Day 1	36.2	38.7	38.9	40.6	0.80	0.005	0.009	0.549
Day 8	45.1	45.3	44.9	45.2	0.25	0.520	0.306	0.957
Day 22	57.5	59.8	56.8	59.4	0.56	0.314	<0.001	0.816
Day 35	69.3	73.3	68.6	71.4	0.75	0.098	<0.001	0.487
Day 49	83.7	86.7	82.9	84.8	0.98	0.193	0.016	0.624
Average daily gain, kg/d
Day 1 to 49	0.94	1.00	0.92	0.96	0.021	0.185	0.014	0.602
Day 1 to 8	0.96	0.99	0.93	0.98	0.036	0.554	0.278	0.935
Day 9 to 22	0.89	1.04	0.86	1.03	0.031	0.384	<0.001	0.748
Day 23 to 35	0.87	1.00	0.87	0.89	0.056	0.348	0.215	0.379
Day 36 to 49	1.00	0.92	0.99	0.93	0.059	0.969	0.262	0.942
Average daily feed intake, kg/d
Day 1 to 49	2.04	2.36	1.92	2.17	0.033	<0.001	<0.001	0.349
Day 1 to 8	1.75	1.87	1.67	1.84	0.051	0.276	0.009	0.651
Day 9 to 22	1.91	2.23	1.78	2.08	0.039	0.001	<0.001	0.779
Day 23 to 35	2.04	2.41	1.98	2.22	0.045	0.010	<0.001	0.209
Day 36 to 49	2.31	2.68	2.11	2.37	0.066	<0.001	<0.001	0.429
G:F ratio
Day 1 to 49	0.46	0.42	0.48	0.44	0.008	0.026	<0.001	0.996
Day 1 to 8	0.55	0.54	0.55	0.53	0.015	0.738	0.475	0.833
Day 9 to 22	0.48	0.46	0.49	0.49	0.009	0.079	0.182	0.563
Day 23 to 35	0.44	0.43	0.45	0.44	0.010	0.499	0.221	0.724
Day 36 to 49	0.40	0.37	0.44	0.42	0.011	<0.001	0.010	0.734

^a Values are presented as least square means with the SEM.

^b Fixed effect of days was significant (P < 0.001) for all parameters.