. 2014 Jun 20;93(7):1599–1607. doi: 10.3382/ps.2013-03277

Table 6.

Broiler breeder egg production and female mortality from 24 to 64 wk 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			Egg production
Growing² (cm)	Laying³ (cm)	Peak feed increase¹	Eggs per hen housed (n)	Hen-day production (%)	Female mortality (%)
7.0			172	62.3	8.8
10.4			175	63.2	7.8
P-value			0.326	0.077	0.525
	6.2		172	62.2^b	8.2
	10.3		175	63.3^a	8.4
P-value			0.195	0.037	0.525
		Fast	173	62.7	9.0
		Slow	174	62.8	7.6
SEM⁴			2.4	0.7	1.3
P-value			0.922	0.741	0.382
7.0	6.2		175^AB	62.9^B	6.6^ab
7.0	10.3		169^B	61.7^B	10.9^a
10.4	6.2		168^B	61.5^B	9.8^ab
10.4	10.3		181^A	65.0^A	5.9^b
P-value			0.004	0.001	0.024
7.0		Fast	171	62.2	10.9
7.0		Slow	173	62.4	6.6
10.4		Fast	176	63.1	7.0
10.4		Slow	174	63.3	8.6
P-value			0.440	0.951	0.083
	6.2	Fast	172	62.6	9.8
	6.2	Slow	171	61.8	6.6
	10.3	Fast	174	62.8	8.2
	10.3	Slow	176	63.9	8.6
SEM⁵			3.4	0.9	1.8
P-value			0.583	0.070	0.270

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

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

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

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

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

⁴SEM for n = 8 pens of 64 hens per pen.

⁵SEM for n = 4 pens of 64 hens per pen.