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

Table 5.

Egg production and bone mineralization in laying hens (trial 3)¹^,².

Items	Treatment			SEM³	Significance level
Items	NC³	PC³	187.5	SEM³	Significance level
Egg production, %
1st 4 wk⁴	97.9	98.5	98.1	0.57	0.767
2nd 4 wk⁴	92. 9^b	98.9^a	98.6^a	0.90	< 0.001
3rd 4 wk⁴	79.6^b	95.6^a	95.0^a	1.65	< 0.001
Overall	90.1^b	97.6^a	97.3^a	0.79	< 0.001
Egg weight, g
1st 4 wk	56.3	56.8	55.4	0.84	0.476
2nd 4 wk	57.2^b	61.3^a	59.9^a	0.82	< 0.001
3rd 4 wk	56.8^b	60.8^a	60.7^a	0.34	< 0.001
Overall	56.8^b	58.9^a	58.5^a	0.35	< 0.001
ADFI, g
1st 4 wk	108^b	112^a	113^a	0.8	< 0.001
2nd 4 wk	102^b	113^a	112^a	0.8	< 0.001
3rd 4 wk	96^b	114^a	113^a	1.4	< 0.001
Overall	102^b	113^a	113^a	0.8	< 0.001
FCR, g
1st 4 wk	1.97^b	2.01^a^b	2.04^a	0.02	0.030
2nd 4 wk	1.93	1.92	1.92	0.02	0.907
3rd 4 wk	2.16^a ^a	1.97^ab	1.96^b	0.03	< 0.001
Overall	2.00	1.97	1.99	0.02	0.384
Broken eggs, %
1st 4 wk	1.0	0.9	0.4	0.30	0.084
2nd 4 wk	2.4^a	0.3^b	0.4^b	0.21	< 0.001
3rd 4 wk	3.5^a	0.1^b	0.4^b	0.32	< 0.001
Overall	2.2^a	0.4^b	0.4^b	0.17	< 0.001
Bones, %
Ash	49.0^b	50.6^a	50.3^ab	0.40	0.021
Calcium	14.9^b	17.7^a	17.0^a	0.31	< 0.001
Phosphorus	5.4^b	5.9^a	5.7^a	0.10	< 0.001
Bones, g
Tibia	4.76	4.91	4.87	0.08	0.333
Ash	2.33^b	2.48^a	2.45^ab	0.04	0.038
Calcium	0.71^b	0.86^a	0.82^a	0.02	< 0.001
Phosphorus	0.25^b	0.29^a	0.28^a	0.01	< 0.001

The control diet was formulated to provide 36 g/kg Ca and 1.1 g/kg non-phytate P; the phytase activity was analyzed as 175 FYT/kg feed for the phytase treatment.

30 replicates per treatment; 4 birds per replicate.

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.