Table 7.

Prececal and total tract digestibility of energy, nitrogen, phosphorus, and calcium, and prececal and total tract InsP₆ hydrolysis of corn–soybean meal- or corn–soybean meal–rapeseed cake-based diets without or with the supplementation of phytase, % (Exp. 2)¹

	BDSBM2		BDRSC3			P-value
Phytase:	0	1,500	0	1,500	SEM	Protein source	Phytase	Protein source × phytase
Prececal
Dry matter	67.2	67.4	65.6	66.1	1.1	0.013	0.472	0.863
Energy	70.5	70.3	68.4	68.6	1.1	0.004	0.982	0.719
Nitrogen	77.8	77.6	70.8	72.1	0.8	<0.001	0.438	0.276
Phosphorus	29.4	61.5	22.5	56.9	2.3	0.017	<0.001	0.376
Calcium	54.9	68.5	47.0	63.4	2.8	0.020	<0.001	0.772
InsP6	31.2	92.1	30.1	92.3	2.5	0.360	<0.001	0.600
Total tract
Dry matter	86.9	86.9	82.2	83.2	0.5	<0.001	0.083	0.062
Energy	87.5	86.8	82.8	82.9	0.5	<0.001	0.166	0.133
Nitrogen	88.5	88.8	82.0	82.4	1.0	<0.001	0.827	0.923
Phosphorus	33.2	64.3	24.0	51.9	3.2	<0.001	<0.001	0.828
Calcium	49.7	67.5	41.7	57.6	4.3	0.007	<0.001	0.654
InsP64	98.9	98.9	98.5	98.9	0.4	0.607	0.552	0.687

¹Data are given as LSMeans and pooled SEM (untransformed data).

²Corn–soybean meal-based basal diet.

³Corn–soybean meal–rapeseed cake-based basal diet.

⁴Number of observations for BD_SBM and BD_RSC without phytase supplementation were n = 5 and n = 4, respectively, and for BD_SBM and BD_RSC with phytase supplementation were n = 6, respectively.