Effects of a novel bacterial phytase expressed in Aspergillus Oryzae on digestibility of calcium and phosphorus in diets fed to weanling or growing pigs

Table 6 Effects of phytase on apparent total tract digestibility (ATTD) of phosphorus and calcium in growing pigs ¹ , Exp. 2

Item	Diets						SEM	P- value		P-value²
	Positive control	Negative control	500 phytase	1,000 phytase	2,000 phytase	4,000 phytase		Positive vs. negative	Negative vs. phytase	L	Q
Feed intake, g/d	1521	1460	1506	1497	1476	1476	58.08	0.47	0.67	0.93	0.81
Phosphorus intake, g/d	8.52	4.82	5.12	5.09	5.02	5.02	0.23	< 0.01	0.37	0.83	0.58
Fecal output, g/d	132.86	118.24	116.94	115.95	117.48	123.99	5.48	0.08	0.96	0.36	0.53
Phosphorus in feces, %	2.59	2.44	1.82	1.52	1.31	1.09	0.07	0.17	< 0.01	< 0.01	< 0.01
Phosphorus output, g/d	3.41	2.87	2.12	1.76	1.54	1.36	0.10	< 0.01	< 0.01	< 0.01	< 0.01
ATTD of phosphorus, %	59.4	39.8	58.1	65.4	69.1	72.8	2.25	< 0.01	< 0.01	< 0.01	< 0.01
Phosphorus absorption, g/d	5.10	1.94	3.00	3.33	3.47	3.66	0.24	< 0.01	< 0.01	< 0.01	< 0.01
Calcium intake, g/d	12.02	8.47	8.89	8.53	8.26	7.97	0.36	< 0.01	0.902	0.13	0.84
Calcium in feces, %	2.45	2.33	1.40	1.29	1.22	0.91	0.13	0.54	< 0.01	< 0.01	< 0.01
Calcium output, g/d	3.20	2.74	1.62	1.50	1.46	1.13	0.16	0.07	< 0.01	< 0.01	< 0.01
ATTD of calcium, %	72.9	67.3	81.4	82.6	82.4	85.6	2.05	0.07	< 0.01	< 0.01	< 0.01
Calcium absorption, g/d	8.82	5.72	7.26	7.03	6.80	6.84	0.39	< 0.01	< 0.01	0.38	0.12

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