Table 6.

Feed intake, excreta characteristics, and retention of P and Ca of broilers, between d 14 and d 17, fed diets with 12% whole RSM (G1), 8.4% dehulled RSM (G2), and 8.4% dehulled rapeseed meal with 3.6% (G3) or 7.2% defatted rapeseed hulls (G4) without (−) or with (+) phytase (Exp1: 10 to 21 d).¹

	RSM		Dehulled RSM							P-value2
					3.6% hulls		7.2% 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	G1-	G1+	G2-	G2+	G3-	G3+	G4-	G4+	SEM	Lin	Lin	Lin	Lin	Qua	Lin	Qua
Feed intake, g/d DM	82	84	83	82	82	81	82	82	0.7	0.90	0.80	0.44	0.91	0.98	0.97	0.78
Excreta
Weight, g/d	106	109	109	105	105	114	106	109	4.14	0.33	0.62	0.48	0.54	0.71	0.42	0.12
Humidity, %	74.8	75.4	76.6	76.5	75.6	76.0	73.7	74.6	0.20	0.21	0.010	0.12	<0.001	0.53	0.008	0.54
DM digestibility	68.5	68.7	70.2	70.6	68.4	68.0	66.2	66.6	0.18	0.56	0.002	0.001	<0.001	0.69	<0.001	0.22
P intake, mg/d	423	453	445	466	459	471	440	483	4.27	<0.001	0.17	0.45	0.74	0.25	0.30	0.85
Excreta P, mg/d	216	207	218	191	220	217	233	227	2.94	0.031	0.88	0.12	0.15	0.60	<0.001	0.38
Ca intake, mg/d	450	469	463	474	470	471	471	476	4.24	0.27	0.44	0.81	0.63	0.84	0.90	0.81
Excreta Ca, mg/d	221	213	226	193	219	214	273	226	3.06	0.014	0.67	0.094	0.31	0.23	0.005	0.66

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.