Table 3.

Impact of lavender essential oil addition on the growth of broiler chickens.

Parameters	Lavender Essential Oil, mg/kg				SEM	p-Value
	0	200	400	600		Linear	Quadratic
IBW (g)	100.2	101.5	101.6	101.9	0.24	0.28	0.25
Starter period
BW (g)	316	324	328	330	3.17	0.17	0.64
BWG (g)	216	223	227	228	3.01	0.21	0.69
FI (g)	263	259	264	264	2.21	0.73	0.77
FCR	1.21	1.16	1.16	1.15	0.01	0.08	0.30
Grower period
BW (g)	1107	1146	1170	1189	13.62	0.15	0.66
BWG (g)	790	822	842	859	11.66	0.18	0.72
FI (g)	1135	1124	1142	1116	18.22	0.82	0.86
FCR	1.43	1.36	1.35	1.29	0.02	0.05	0.89
Finisher period
BW (g)	2175	2120	2214	2182	19.80	0.53	0.78
BWG (g)	1067	974	1043	993	22.68	0.47	0.65
FI (g)	1681	1740	1648	1616	36.05	0.43	0.57
FCR	0.77	0.82	0.74	0.74	0.01	0.30	0.48
Overall performance
BW (g)	2174	2120	2214	2182	19.80	0.53	0.78
BWG (g)	2074	2019	2112	2080	19.82	0.55	0.77
FI (g)	3080	3124	3055	2996	49.41	0.54	0.65
FCR	1.48	1.54	1.45	1.44	0.02	0.38	0.56
PER	3.22	3.09	3.30	3.34	0.06	0.33	0.52
RGR	182.36	181.73	182.41	182.15	0.16	0.97	0.57

IBW: initial body weight, BW: body weight, BWG: body weight gain, FI: feed intake, FCR: feed conversion ratio, PER: protein efficiency ratio, RGR: relative growth rate.