Dietary oregano aqueous extract improves growth performance and intestinal health of broilers through modulating gut microbial compositions

Table 4 Effects of dietary supplementation with oregano aqueous extract on growth performance of broilers¹(Exp. 1)

Items	Treatments²						SEM³	*P-value*
Items	Con	Anti	OAE400	OAE500	OAE600	OAE700	SEM³	*P-value*
d 1–21
BW, g	1,017.52^ab	1,066.22^a	997.60^b	997.26^b	1,035.96^ab	1,043.10^ab	7.321	0.030
ADG, g	46.55^ab	48.87^a	45.60^b	45.58^b	47.43^ab	47.77^ab	0.349	0.030
ADFI, g	67.61	70.36	67.39	66.80	71.55	70.61	0.578	0.069
FCR	1.48	1.45	1.51	1.48	1.48	1.51	0.011	0.630
d 22–42
BW, g	2,847.05^c	3,102.39^b	3,010.53^bc	2,940.42^bc	3,016.13^bc	3,278.39^a	31.194	< 0.001
ADG, g	87.12^c	96.96^b	85.85^bc	92.53^bc	94.29^bc	106.44^a	1.417	0.001
ADFI, g	197.28	183.17	194.31	175.48	186.67	202.28	3.583	0.300
FCR	2.28^a	1.90^b	2.03^ab	1.91^b	1.91^b	1.91^b	0.040	0.019
d 1–42
ADG, g	66.83^c	72.91^b	70.73^bc	69.06^bc	70.86^bc	77.10^a	0.743	< 0.001
ADFI, g	64.63	70.36	66.76	65.50	68.06	67.06	1.020	0.685
FCR	1.86	1.72	1.81	1.75	1.78	1.72	0.028	0.650

¹ n = 7 replicates per treatment
²Con, OAE400, OAE500, OAE600 and OAE700, broilers received a basal diet supplemented with 0, 400, 500, 600 or 700 mg/kg oregano aqueous extract, respectively; Anti, broilers received a basal diet supplemented with 7 g/kg mycolistin sulfate and 35 g/kg locke sand arsine
³SEM Standard error of the mean
^a,b,cValues within a row with no common superscripts differ significantly (P < 0.05)

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