Table 4.

Growth performance, bone characteristics, and ileal digestibility of broilers 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
Performances
BW d 10, g	288	288	286	292	291	285	288	284	2.02	0.80	0.80	0.67	0.83	0.54	0.35	0.67
BW d 21, g	862	860	871	891	849	858	845	843	5.38	0.53	0.68	0.17	0.21	0.63	0.028	0.64
ADG, g/d	53.9	53.8	55.0	56.1	52.2	53.8	52.3	52.6	0.43	0.34	0.48	0.14	0.072	0.27	0.025	0.66
ADFI, g/d	81.4	82.6	82.8	83.9	80.1	83.2	79.8	81.0	0.61	0.14	0.53	0.58	0.16	0.54	0.20	0.69
FCR	1.52	1.53	1.51	1.50	1.54	1.53	1.53	1.52	0.01	0.89	0.84	0.14	0.49	0.32	0.29	0.30
Bone characteristics
Dry weight, g	2.33	2.41	2.36	2.44	2.40	2.42	2.41	2.35	0.02	0.51	0.69	0.75	0.60	0.87	0.30	0.73
Ash weight, g DM	0.85	0.91	0.86	0.90	0.88	0.89	0.86	0.85	0.01	0.18	0.78	0.74	0.92	0.58	0.14	0.63
Ash, % DM	36.5	37.8	36.3	37.6	36.1	36.7	35.7	36.0	0.15	0.001	0.80	0.69	0.26	0.93	0.006	0.78
BS3, N	140	145	138	144	131	140	134	135	1.91	0.14	0.80	0.87	0.57	0.43	0.23	0.90

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.

³Bone breaking strength.