Table 9.

Egg quality responses of hens during phase 1 (20 to 27 wk) and 2 (28 to 46 wk) as influenced by a 2%-unit CP reduction with varying levels of L-Ile.

Item	Breaking force (kgf)	Albumen height (mm)	Haugh unit
Phase 1
CON	4.83	4.97	70.13
Ile70	4.87	5.10	72.14
Ile80	4.63	5.25	72.93
Ile90	4.86	5.19	72.46
Ile100	4.66	5.47	74.36
SEM	0.065	0.154	1.243
P-value	0.015	0.127	0.127
Contrasts (P-value)
CON vs. Ile70	0.645	0.540	0.248
CON vs. Ile80	0.027	0.198	0.109
Linear	0.027	0.112	0.234
Quadratic	0.856	0.585	0.586
Phase 2
CON	4.49	5.14a,b	68.33a,b
Ile70	4.54	4.20b	66.60b
Ile80	4.34	5.05a,b	67.59a,b
Ile90	4.56	5.28a,b	69.79a,b
Ile100	4.50	5.40a	71.59a
SEM	0.059	0.116	1.149
P-value	0.077	0.035	0.020
Contrasts (P-value)
CON vs. Ile70	0.540	0.172	0.281
CON vs. Ile80	0.079	0.594	0.649
Linear	0.290	0.002	0.001
Quadratic	0.383	0.536	0.781

Abbreviations: CON, control; CP, crude protein.

^a,bValues are statistically significant (P < 0.05).