Table 9.

ATTD, DMI, EPL, and STTD of P in torula yeast and fish meal (FM) without and with microbial phytase^1,2

Item	No phytase		1,000 phytase units			P-value
Ingredient	Torula yeast	FM	Torula yeast	FM	SEM	Ingredient	Phytase	Ingredient × phytase
Feed intake, g/d	625	529	585	508	33.85	0.016	0.368	0.786
DMI, g/d	584	483	545	462	31.25	0.007	0.342	0.779
P intake, g/d	4.26	5.01	4.51	4.71	0.28	0.102	0.917	0.331
Fecal output, g/d	21.7	34.8	18.9	28.4	3.08	0.001	0.149	0.557
P in feces, %	2.22	4.97	2.24	5.11	0.24	<0.001	0.741	0.792
P in feces, g/d	0.48	1.76	0.42	1.50	0.18	<0.001	0.384	0.602
ATTD of P, %	88.6	66.2	90.7	68.8	2.58	<0.001	0.372	0.924
EPL3, mg/d	111.0	91.8	103.6	87.8	5.94	0.007	0.342	0.779
STTD of P4, %	91.2	68.0	93.0	70.7	2.58	<0.001	0.400	0.873

¹Data are least square means of 8 observations.

²Values for daily intake or output are the average of a 4-d collection period.

³Calculated by multiplying the EPL (190 mg/kg DMI; NRC, 2012) by the daily DMI.

⁴Values for STTD were calculated by correcting ATTD values by the EPL.