Effects of dietary phosphorous supplementation on laying performance, egg quality, bone health and immune responses of laying hens challenged with Escherichia coli lipopolysaccharide

Table 4 The eggshell and egg qualityof laying hens. Data are presented as means (SD)^a

NPP,%	LPS	Shell weight/ egg weight, %	Eggshell strength, kg/cm²	Yolk color	Ca of eggshell, %	P of eggshell,%	Eggshell color	Eggshell thickness, mm	Haugh units	Albumen height, mm
0.12	–	11.93	3.81	6.40^b	35.13	0.199	63.43^c	0.322	77.82	6.17
0.12	+	10.63	3.56	5.73^d	35.24	0.205	64.44^bc	0.342	82.57	6.84
0.40	–	11.54	3.88	6.77^c	34.45	0.208	65.40^b	0.329	77.82	6.23
0.40	+	11.54	4.30	7.70^b	35.08	0.201	63.38^c	0.332	85.35	7.27
SEM		0.34	0.08	0.12	0.14	0.003	0.30	0.002	0.72	0.10
Main effect means
NPP
0.12		11.28	3.69	6.07^c	35.19	0.202	63.92	0.332	80.24	6.51
0.40		11.54	4.08	7.23^b	34.77	0.204	64.41	0.330	81.52	6.74
LPS
–		11.74	3.85	6.58	34.79	0.204	64.41	0.326^c	77.82^c	6.20^c
+		11.08	3.93	6.72	35.17	0.203	63.91	0.337^b	83.94^b	7.05^b
P-value
NPP		0.070	0.740	<0.001	0.261	0.808	0.445	0.695	0.294	0.206
LPS		0.187	0.082	0.490	0.381	0.935	0.401	0.016	<0.001	<0.001
NPP × LPS		0.151	0.586	<0.001	0.490	0.349	0.012	0.089	0.293	0.339

^aMeans were calculated on n = 5 replicates (6 eggs per replicate) per treatment
^b-dWithin comparisons, means in a column with no common superscripts differ significantly (P < 0.05)

ISSN: 2049-1891