Table 2. Effects of dietary supplementation of silkworm powder on laying performance in laying hens¹⁾

	Control	Silkworm powder			SEM	p-value
		0.01%	0.03%	0.05%		Linear	Quadratic
Egg production (%)
4 wks	92.2	92.5	92.8	92.8	0.35	0.33	0.23
8 wks	91.5	92.3	93.6	92.7	0.31	0.21	0.49
12 wks	90.4b	91.0b	92.4a	92.8a	0.43	<0.05	0.11
Total	91.4b	91.9ab	92.6a	92.8a	0.39	<0.05	0.08
Egg weight (g)
4 wks	64.5	64.1	64.0	64.9	0.11	0.22	0.35
8 wks	64.8	65.2	64.7	65.3	0.09	0.32	0.63
12 wks	65.4	65.2	65.4	65.6	0.10	0.55	0.67
Total	64.9	64.8	64.7	65.1	0.10	0.38	0.44
Egg mass (g/d)
4 wks	59.5	59.3	59.3	60.2	0.13	0.23	0.33
8 wks	59.3	60.2	59.9	60.5	0.14	0.41	0.59
12 wks	59.1b	59.3b	60.4a	60.9a	0.11	<0.05	0.08
Total	59.3b	59.6ab	59.9a	60.4a	0.13	<0.05	0.07
Feed intake (%)
4 wks	105.2	103.6	105.6	104.0	0.55	0.54	0.58
8 wks	110.1	107.0	107.5	108.0	0.67	0.57	0.63
12 wks	111.8	109.9	106.0	107.6	0.63	0.63	0.75
Total	109.0	106.8	106.4	106.5	0.61	0.58	0.64
Feed conversion ratio
4 wks	1.77a	1.75b	1.78a	1.73b	0.02	0.13	0.28
8 wks	1.83a	1.78b	1.79b	1.78b	0.01	0.21	0.24
12 wks	1.86a	1.85a	1.75b	1.77b	0.01	<0.05	0.19
Total	1.82a	1.79b	1.78b	1.78c	0.01	<0.05	<0.05

Data are least squares means of 6 observations per treatment.
Means within the same row with no common superscripts differ significantly (p<0.05).