Table 5.

Egg weight (EW) percentage egg components and yolk:albumen ratio at 30 wk of age as affected by broiler breeder female feeder space allocation during growing and laying periods, and feed increase rate from photostimulation to peak egg production, as well as interactions among these factors

Feeder space/female
Growing2 (cm)	Laying3 (cm)	Peak feed increase1	EW (g)	Yolk weight (% of EW)	Egg shell (% of EW)	Albumen (% of EW)	Yolk:albumen ratio (g:g)
7.0			54.84	28.03	9.24	62.73	0.45
10.4			54.98	27.86	9.16	62.98	0.44
P-value			0.761	0.350	0.127	0.202	0.38
	6.2		55.01	27.91	9.19	62.90	0.45
	10.3		54.80	27.97	9.22	62.81	0.45
P-value			0.638	0.714	0.585	0.624	0.787
		Fast	55.10	28.24A	9.16	62.60b	0.45A
		Slow	54.72	27.64B	9.25	63.11a	0.44B
SEM4			0.30	0.12	0.03	0.12	0.01
P-value			0.404	0.007	0.084	0.020	0.005
7.0	6.2		54.60	28.23a	9.25	62.52b	0.45a
7.0	10.3		55.08	27.82ab	9.23	62.94ab	0.44ab
10.4	6.2		55.43	27.60b	9.13	63.28a	0.44b
10.4	10.3		54.52	28.13ab	9.20	62.68b	0.45ab
P-value			0.143	0.022	0.394	0.020	0.022
7.0		Fast	55.13	28.36	9.17	62.47	0.46
7.0		Slow	54.55	27.69	9.31	63.00	0.44
10.4		Fast	55.06	28.13	9.14	62.73	0.45
10.4		Slow	54.89	27.59	9.19	63.22	0.44
P-value			0.638	0.716	0.368	0.920	0.928
6.2		Fast	55.35	28.20	9.19	62.61	0.45
	6.2	Slow	54.68	27.63	9.18	63.19	0.44
	10.3	Fast	54.85	28.29	9.12	62.59	0.45
	10.3	Slow	54.76	27.66	9.31	63.03	0.44
SEM5			0.43	0.17	0.05	0.18	0.02
P-value			0.522	0.716	0.064	0.687	0.703

^a,bMeans in a column that possess different superscripts differ significantly (P ≤ 0.05).

^A,BMeans in a column that possess different superscripts differ significantly (P ≤ 0.01).

¹Feed increase rates (see Figure 2) from photostimulation to peak egg production.

²Feeder space allocations 7.0 or 10.4 cm per each of 76 pullets during growing.

³Feeder space allocations 6.2 or 10.3 cm per each of 64 hens during laying.

⁴SEM for n = 8 pens with mean of approximately 40 eggs weighed per pen.

⁵SEM for n = 4 pens with mean of approximately 40 eggs weighed per pen.