Table 2.

Effects of dietary marine-derived polysaccharides (MDP) on productive performance in late-phase laying hens.

Items	Dietary MDP levels (mg/kg)				SEM1	P-value
	0	1,000	2,500	5,000		Linear	Quadratic
Egg production, %
1–2 wk	60.52	63.68	63.14	61.61	1.50	0.692	0.140
3–4 wk	60.97a	67.64b	67.32b	66.34a,b	1.94	0.088	0.067
5–6 wk	63.31a	69.13b	67.31a,b	65.79a,b	1.38	0.376	0.018
1–6 wk	61.52a	66.91b	65.66b	64.92b	1.08	0.083	0.013
Cracked egg rate, %
1–2 wk	12.07	12.24	11.44	11.43	0.53	0.273	0.864
3–4 wk	12.62a	11.40a,b	11.25b	11.10b	0.42	0.025	0.224
5–6 wk	12.47	11.52	12.41	11.79	0.40	0.532	0.678
1–6 wk	12.43a	11.68a,b	11.72a,b	11.46b	0.25	0.023	0.356
Egg weight, g
1–2 wk	58.91	57.69	57.67	58.85	0.78	0.953	0.147
3–4 wk	59.16	56.65	58.20	58.69	0.89	0.974	0.114
5–6 wk	58.93	58.72	57.43	57.77	1.09	0.344	0.805
1–6 wk	58.99	57.59	57.73	58.34	0.69	0.570	0.166
Average daily feed intake, g
1–2 wk	100.75	99.88	98.14	102.32	2.25	0.770	0.279
3–4 wk	99.62	98.95	100.17	99.10	3.24	0.992	0.960
5–6 wk	98.91	102.49	97.76	98.93	2.60	0.696	0.649
1–6 wk	99.76	100.43	98.69	100.15	1.57	0.934	0.809
Feed efficiency, g of feed/g of egg
1–2 wk	2.83	2.72	2.70	2.85	0.10	0.944	0.235
3–4 wk	2.77	2.60	2.57	2.55	0.11	0.175	0.517
5–6 wk	2.66	2.53	2.54	2.61	0.12	0.777	0.383
1–6 wk	2.75	2.61	2.60	2.65	0.06	0.275	0.162

^a,bMeans in the same row with different letters are significantly different at P < 0.05.

¹SEM, standard error of mean.