Table 3. Effect of sea buckthorn seed supplementation on hen day egg production, egg weight, eggshell weight and eggshell thickness of laying hens.

Age (week)	Control	T1	T2	T3	p-value
Hen day egg production (%)
36	70.21±0.95	71.93±0.98	73.93±0.89	73.30±1.23	0.24
37	70.24±1.19	70.00±1.19	72.38±1.19	71.76±2.27	0.56
38	68.21±0.68	71.43±0.58	72.47±0.41	72.21±0.89	0.12
39	71.43±0.58	72.86±0.58	75.35±0.68	75.00±1.01	0.32
40	70.24±1.19b	75.00±2.27ab	77.38±1.19a	79.76±2.27a	0.01
Egg weight (g)
36	59.07±0.24	60.07±0.41	60.62±0.34	61.47±0.51	0.63
37	59.54±0.65	59.64±0.27	60.22±0.57	61.36±0.31	0.106
38	59.56±0.70	59.85±0.23	60.19±0.70	61.18±0.44	0.403
39	58.69±0.56b	59.11±0.61b	60.88±0.50a	61.68±0.35a	0.003
40	58.85±0.46b	59.48±0.58b	60.29±0.34ab	61.10±0.38a	0.03
Eggshell weight (g)
36	5.07±0.25	4.89±0.24	4.82±0.19	4.72±0.12	0.70
37	4.92±0.21	4.88±0.17	4.72±0.25	4.52±0.17	0.53
38	4.89±0.21	4.77±0.28	4.71±0.16	4.63±0.08	0.83
39	5.04±0.37	4.93±0.27	4.80±0.24	4.56±0.21	0.67
40	5.00±0.44	4.94±0.39	4.63±0.16	4.66±0.23	0.81
Eggshell thickness (mm)
36	0.49±0.02	0.47±0.01	0.45±0.01	0.45±0.01	0.24
37	0.48±0.01	0.47±0.02	0.47±0.01	0.45±0.02	0.52
38	0.47±0.01	0.47±0.01	0.46±0.02	0.45±0.02	0.80
39	0.49±0.02	0.48±0.02	0.46±0.01	0.46±0.01	0.53
40	0.48±0.03	0.47±0.01	0.45±0.02	0.45±0.02	0.37

Means in the same column with different superscripts are significantly different (p<0.05).

T1–3, buckthorn seeds were supplemented at the rate of 1, 2 and 3 g/kg of feed respectively.