Table 6.

Summary of dietary effects on standardized ileal digestibility (SID) of Ca and P and digestible Ca and P in the presence or absence of phytase.¹.

TRT	n	Phytase U/kg	Ca2		Phytate		SID, %3		Digestible, %4
			Source	GMD, μm	Source	%	Ca	P	Ca	P
1	7	0	--	--	Corn	0.234	10.06	72.18	0.003	0.227
2	14	0	LM	800	Corn	0.234	43.00	24.03	0.333	0.077
3	8	0	LM	151	Corn	0.234	33.56	14.08	0.261	0.044
4	7	0	Bone	151	Corn	0.234	68.68	50.50	0.544	0.277
5	7	0	LM	800	Corn/SBM	0.220	49.34	32.46	0.415	0.106
6	7	1,000	--	--	Corn	0.234	17.54	91.13	0.005	0.287
7	14	1,000	LM	800	Corn	0.234	55.36	87.47	0.429	0.280
8	7	1,000	LM	151	Corn	0.234	42.62	60.84	0.331	0.191
9	7	1,000	Bone	151	Corn	0.234	70.42	67.07	0.558	0.368
10	7	1,000	LM	800	Corn/SBM	0.220	62.50	91.02	0.525	0.298
11	7	0	LM	800	None	0	84.31	91.42	0.662	0.285
12	7	0	LM	151	None	0	72.89	91.84	0.573	0.286
		P-values					<0.001	<0.001	<0.001	<0.001

¹Multiple comparison was not conducted; SEM for individual mean is not shown in the summary table. Specific comparisons will be made in separate tables.

²LM, limestone; GMD, geometric mean diameter. Limestone is the same limestone source with different particle sizes. Ca source was added to provide 0.7% Ca in the final diet. Bone, bone from swine meat meal ground to 151 μm.

³Standardized ileal Ca or P digestibilities. The non–diet-related endogenous Ca and P losses was determined using 6 pens in this experiment and used for determining standardized from apparent digestibilities and were 105.6 and 190.8 mg per kg DM intake, respectively.

⁴Digestible Ca and P determined by multiplying analyzed diet Ca or P by the digestibility of that nutrient.