. 2018 Nov 18;98(4):1697–1705. doi: 10.3382/ps/pey494

Table 5.

Effect of different rapeseed oil sources and levels on egg quality of laying hens at 12 wk.¹

		Egg shell color
Item		L*	a*	b*	Eggshell strength, kg/cm³	Eggshell thickness, mm	Albumen height, mm	Yolk color	HU	Yolk ratio, %	Shell ratio, %	Albumen ratio, %
Source	Level
Control	0	75.23	4.14	14.67	5.27	35.94	6.50^b	10.50^a	78.72^b	27.05^a	10.77	62.76^b
MH	2%	75.80	3.89	14.50	5.15	36.92	6.83^a,b	10.14^a,b	82.35^a,b	26.63^a	10.80	62.46^b
MH	4%	75.56	3.87	14.85	5.06	37.24	6.83^a,b	8.57^d	82.46^a,b	25.04^b	10.69	64.13^a
DH	2%	75.39	4.04	14.81	5.23	35.51	6.66^a,b	9.60^b,c	81.14^a,b	26.76^a	10.72	62.18^b
DH	4%	76.40	4.02	14.58	5.40	35.83	6.98^a,b	8.67^d	83.30^a	26.47^a	10.76	62.67^b
ML	2%	77.40	3.48	14.30	5.33	35.97	7.03^a	9.85^b,c	83.53^a	27.06^a	10.66	61.96^b
ML	4%	75.99	3.94	14.75	5.03	36.08	6.62^a,b	8.63^d	80.07^a,b	26.05^a,b	10.41	63.20^a,b
DL	2%	75.68	4.05	14.38	4.80	35.67	6.90^a,b	9.47^c	82.43^a,b	26.90^a	10.55	62.32^b
DL	4%	75.07	4.33	14.54	4.96	36.35	7.03^a	8.70^d	83.32^a	26.62^a	10.65	62.12^b
SEM		0.57	0.26	0.36	0.20	0.57	0.11	0.12	0.87	0.25	0.15	0.3
P-value		0.13	0.61	0.97	0.49	0.44	<0.01	<0.01	<0.01	<0.01	0.69	<0.01
Main effect
Source	MH	75.68	3.88	14.68	5.10	37.08	6.83	9.36	82.4	25.83	10.74	63.30
	DH	75.89	4.03	14.69	5.31	35.67	6.82	9.14	82.22	26.61	10.74	62.42
	ML	76.70	3.71	14.52	5.18	36.03	6.82	9.24	81.8	26.56	10.53	62.58
	DL	75.37	4.19	14.46	4.88	36.01	6.96	9.09	82.88	26.76	10.6	62.22
SEM		0.39	0.18	0.26	0.15	0.42	0.08	0.09	0.61	0.18	0.11	0.22
Level	2%	76.06	3.87	14.50	5.13	36.02	6.85	9.77^a	82.36	26.84^a	10.68	62.23^b
	4%	75.76	4.04	14.68	5.11	36.37	6.86	8.64^b	82.29	26.04^b	10.62	63.03^a
SEM		0.28	0.13	0.19	0.11	0.29	0.10	0.06	0.43	0.13	0.08	0.18
P-value
Source		0.11	0.29	0.90	0.22	0.10	0.57	0.12	0.66	<0.01	0.42	<0.01
Level		0.43	0.34	0.49	0.93	0.39	0.9	<0.01	0.9	<0.01	0.59	<0.01
Source*level		0.18	0.74	0.81	0.63	0.97	0.02	0.01	<0.01	0.03	0.67	0.02
Contrast²		0.26	0.51	0.83	0.49	0.68	<0.01	<0.01	<0.01	0.02	0.47	0.68

^a-cMeans with different superscripts in the same column differ significantly (P < 0.05).

¹Each mean represents 24 cages, with 1 layers/cage. Abbreviation represented: MH = high erucic acid of Mianyang, DH = high erucic acid of Deyang, ML = low erucic acid of Mianyang, DL = low erucic acid of Deyang L* = lightness; a* = redness; b* = yellowness.

²Contrast: control vs other rapeseed oil groups.