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 5 Effects of phytase on apparent total tract digestibility (ATTD) of phosphorus and calcium in weanling pigs ¹ , Exp. 1

Item	Diets						SEM	P- value		P-value²
	Positive control	Negative control	500 phytase	1,000 phytase	2,000 phytase	4,000 phytase	SEM	Positive vs. negative	Negative vs. phytase	L	Q
Feed intake, g/d	645	633	629	646	624	611	18.06	0.65	0.77	0.28	0.69
Phosphorus intake, g/d	4.26	2.28	2.26	2.33	2.25	2.14	0.08	< 0.01	0.68	0.12	0.49
Fecal output, g/d	66.48	58.79	58.06	56.11	57.15	62.61	3.77	0.16	0.94	0.37	0.36
Phosphorus in feces, %	2.53	2.30	1.51	1.46	1.22	1.10	0.07	0.023	< 0.01	< 0.01	< 0.01
Phosphorus output, g/d	1.68	1.35	0.87	0.81	0.71	0.68	0.07	< 0.01	< 0.01	< 0.01	< 0.01
ATTD of phosphorus, %	60.5	40.5	61.6	65.1	68.7	68.0	2.34	< 0.01	< 0.01	< 0.01	< 0.01
Phosphorus absorption, g/d	2.58	0.93	1.39	1.51	1.54	1.46	0.07	< 0.01	< 0.01	< 0.01	< 0.01
Calcium intake, g/d	5.55	3.04	3.02	3.30	3.49	3.23	0.10	< 0.01	0.07	0.07	< 0.01
Calcium in feces, %	2.29	1.86	1.37	1.11	0.94	0.79	0.13	0.019	< 0.01	< 0.01	< 0.01
Calcium output, g/d	1.52	1.09	0.80	0.60	0.52	0.50	0.08	< 0.01	< 0.01	< 0.01	< 0.01
ATTD of calcium, %	72.5	63.9	73.7	81.7	84.8	84.6	2.30	0.012	< 0.01	< 0.01	< 0.01
Calcium absorption, g/d	4.02	1.95	2.22	2.69	2.97	2.74	0.12	< 0.01	< 0.01	< 0.01	< 0.01

ISSN: 2049-1891