Table 2. Effects of herbal rations on production performance of broilers.

Variables	CT-R	Herbal rations			SEM	p-value
		LG-R	SM-R	LS-R
FBW (gm/b)	1,496.43 ± 25.94	1,548.41 ± 22.22	1,520.24 ± 19.29	1,538.23 ± 24.47	8.235	0.100
BWG (gm/b)	1,450.56b ± 24.32	1,502.15a ± 20.89	1,474.11ab ± 17.89	1,492.36ab ± 22.84	7.964	0.078
FI (gm/b)	2,755.10a ± 19.50	2,754.95a ± 44.64	2,672.65b ± 25.95	2,701.03ab ± 32.21	13.29	0.031
FCR	1.89a ± 0.03	1.83b ± 0.01	1.82b ± 0.01	1.81b ± 0.01	0.011	0.001
PEF (%)	218.25b ± 7.15	234.02a ± 2.97	232.30a ± 3.46	235.59a ± 4.65	2.398	0.008
DY (%)	57.39c ± 0.38	59.81b ± 0.51	61.65a ± 0.53	62.36a ± 0.46	0.591	0.001

CT-R: Corn-soya based basal ration, LG-R: CT-R + 1.0% fresh lemongrass on DM basis, SM-R: CT-R + 1.0% fresh spearmint on DM basis, LS-R: CT-R + 0.5% fresh lemongrass and 0.5% fresh spearmint on DM basis, FBW: Final body weight, BWG: Body weight gain, FI: Feed intake, FCR: Feed conversion ratio, PEF: Production efficiency factor, DY: Dressing yield, gm: Gram, b: Bird, %: Percentage, SEM: Standard error mean.

^a–c Means values with dissimilar superscripts differ significantly (p < 0.05).