. 2020 Jun 22;99(9):4384–4397. doi: 10.1016/j.psj.2020.05.028

Table 5.

Feed intake (g) of laying hens as affected by different housing systems, essential oils, and their interaction during the experiment.

Items	Feed intake (g) during
Items	28–36 wk	36–44 wk	44–52 wk	52–60 wk	60–68 wk	68–76 wk
Housing system
Cage	89.15	109.20	119.30	126.35	121.55	115.40
Floor	95.77	113.12	125.57	134.30	129.25	117.20
Essential oils (EOs)
0	93.80^a	112.95^a	123.80^a	132.45^a	127.25^a	117.60^a
Thymol	91.25^b	109.95^b	121.35^b	128.20^c	124.50^b,c	115.75^c
Carvacrol	92.40^a,b	111.65^a,b	123.00^a,b	131.35^a,b	126.00^a,b	116.85^a,b
Eugenol	92.40^a,b	110.10^b	121.60^b	129.30^b,c	123.85^c	115.00^b,c
Housing × EOs
Cage
0	89.60	110.70	119.50^d	127.10^e	122.20^e	116.10^b
Thymol	88.70	107.70	119.10^d	125.60^f	120.90^f	114.70^c
Carvacrol	89.10	110.10	119.40^d	127.20^e	121.90^e	115.30^b
Eugenol	89.20	108.30	119.20^d	125.50^f	121.20^e	115.50^b
Floor
0	98.00	115.20	128.10^a	137.80^a	132.30^a	119.10^a
Thymol	93.80	112.20	123.60^c	130.80^d	128.10^c	116.80^b
Carvacrol	95.70	113.20	126.60^b	135.50^b	130.10^b	118.40^a
Eugenol	95.60	111.90	124.00^c	133.10^c	126.50^d	114.50^c
SEM	0.639	0.730	0.663	0.781	0.785	0.545
Portability
Housing system	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
EOs	0.004	0.001	0.002	<0.001	0.001	<0.001
Housing × EOs	0.101	0.717	0.011	0.013	0.035	0.002

^a-fMeans in the same column within each classification bearing different superscript lowercase letters are significantly different (P < 0.05 or 0.01).