Table 9.

Feed intake, excreta characteristics, and retention of P and Ca of broilers, between d 27 and d 30, fed diets with 15% whole RSM (F1), 12% dehulled RSM (F2), and 12% dehulled rapeseed meal with 4.5% (F3) or 9% defatted rapeseed hulls (F4) without (−) or with (+) phytase (Exp2: 21 to 31 d).¹

	RSM		Dehulled RSM							P-value2
					4.5% hulls		9.0% hulls			Microbial phytase effect	Dehulled effect		Hull inclusion effect
Diets	1	2	3	4	5	6	7	8		1,3,5,7 vs. 2,4,6,8,	1 vs. 3	2 vs. 4	3 vs. 5 vs. 7		4 vs. 6 vs. 8
Description	F1-	F1+	F2-	F2+	F3-	F3+	F4-	F4+	SEM	Lin	Lin	Lin	Lin	Qua	Lin	Qua
Feed intake, g DM	181	177	170	186	175	173	164	164	1.63	0.35	0.089	0.13	0.29	0.14	0.001	0.63
Excreta characteristics
Weight, g	256	246	233	286	243	255	239	238	4.02	0.099	0.14	0.009	0.71	0.62	0.005	0.62
Humidity, %	78.9	78.8	79.5	82.2	77.9	79.0	77.2	76.9	0.33	0.16	0.62	0.004	0.062	0.65	<0.001	0.62
DM digestibility, %	70.6	71.4	73.2	72.4	69.7	69.7	66.9	68.1	0.28	0.51	0.008	0.30	<0.001	0.70	<0.001	0.51
P intake, mg	838	830	799	840	827	839	754	802	7.65	0.12	0.19	0.73	0.14	0.049	0.23	0.51
Excreta P, mg	438	390	379	417	461	423	442	420	6.93	0.21	0.024	0.31	0.025	0.027	0.92	0.85
Ca intake, mg	842	809	807	803	761	775	703	738	7.82	0.82	0.20	0.83	<0.001	0.80	0.029	0.85
Excreta Ca, mg	344	312	306	335	433	396	403	378	6.42	0.13	0.068	0.27	<0.001	<0.001	0.057	0.035

¹n = 18 per treatment.

²Contrast analysis: linear effect of microbial phytase; linear effect of dehulled rapeseed seed without and with microbial phytase; linear and quadratic effects of the inclusion of hulls without and with microbial phytase.