. 2022 Apr 1;101(6):101894. doi: 10.1016/j.psj.2022.101894

Table 4.

Egg production and bone mineralization in laying hens (trial 2)¹^,².

Items	Treatment			SEM³	Significance level
Items	NC³	PC³	187.5	SEM³	Significance level
Egg production, %
1st 4 wk⁴	89.0^b	92.8^ab	96.0^a	1.56	0.012
2nd 4 wk⁴	86.5	90.2	93.7	2.52	0.139
3rd 4 wk⁴	81.8^b	92.5^a	90.4^ab	2.68	0.019
Overall	85.7^b	91.8^ab	93.4^a	1.85	0.015
Egg weight, g
1st 4 wk	56.1^b	57.3^ab	58.7^a	0.72	0.057
2nd 4 wk	57.2^ab	61.3^a	59.9^ab	0.82	0.005
3rd 4 wk	58.1^b	60.7^ab	61.4^a	0.75	0.011
Overall	57.1^b	59.8^ab	60.0^a	0.65	0.006
ADFI, g
1st 4 wk	126	126	126	2.5	0.995
2nd 4 wk	122	123	124	3.3	0.910
3rd 4 wk	114^b	121^a	117^ab	1.8	0.037
Overall	121	123	122	1.9	0.605
FCR, g
1st 4 wk	2.54^a	2.38^ab	2.24^b	0.07	0.010
2nd 4 wk	2.58^a	2.25^b	2.21^b	0.08	0.007
3rd 4 wk	2.44^a	2.17^ab	2.12^b	0.08	0.016
Overall	2.51^a	2.27^b	2.19^b	0.06	0.001
Broken eggs, %
1st 4 wk	0.7	0.0	0.0	0.30	0.128
2nd 4 wk	2.5^a	0.6^ab	0.1^b	0.57	0.002
3rd 4 wk	4.8	0.9	0.0	1.46	0.048
Overall	2.7^a	0.5^ab	0.0^b	0.66	0.002
Bones, %
Ash	61.4^ab	62.7^a	60.2^b	0.53	0.006
Calcium	22.8^ab	23.2^a	22.3^b	0.21	0.013
Phosphorus	10.4^ab	10.7^a	10.2^b	0.10	0.002
Bones, g
Tibia diaphysis	0.90^b	1.10^a	1.03^ab	0.05	0.011
Ash	0.55^b	0.69^a	0.62^ab	0.03	0.003
Calcium	0.20^b	0.26^a	0.23^ab	0.01	0.004
Phosphorus	0.09^b	0.12^a	0.11^ab	0.01	0.002

The control diet was formulated to provide 40.0 g/kg Ca and 1.0 g/kg non-phytate P; the phytase activity was analyzed as 176 FYT/kg feed for phytase treatment.

12 replicates (3 hens per replicate) per treatment for egg production parameters and 18 replicates for bone parameters.

NC: negative control; PC: positive control.

⁴

1st, 2nd, and 3rd four wk indicate hen's age from wk 25 to 29, 29 to 33, and 33 to 37, respectively.

^a-b

Means in the same row and not sharing superscript letters differ significantly.