Table 2.

Effects of dietary supplementation of B. subtilis or B. licheniformis on growth performance in broilers.

	Treatments1,2
Items	NCO	BS	BL	SEM	P-value
Body weight, g/bird
1 d	37.89	37.94	37.24	0.26	0.156
21 d	758.46	802.22	803.14	9.84	0.072
42 d	1828.94c	2069.88b	2174.37a	37.63	0.001
Average daily gain, g/bird
1-21 d	34.31	36.39	36.47	0.47	0.069
22–42 d	50.98c	60.54b	65.30a	1.58	0.001
1–42 d	42.64c	48.38b	50.88a	0.89	0.001
Average daily feed intake, g/bird
1–21 d	55.93	57.30	57.07	0.66	0.689
22–42 d	108.54b	124.26a	129.02a	2.50	0.001
1–42 d	77.58b	85.00a	87.97a	1.20	0.001
Feed: Gain ratio, (g:g)
1–21 d	1.63a	1.57ab	1.56b	0.01	0.001
22–42 d	2.13	2.05	1.98	0.40	0.156
1–42 d	1.82	1.76	1.73	0.02	0.107

^a,bMean with different superscripts in the same row differ significantly (P < 0.05).

¹NCO = basal diet provided as control; BS = basal diet supplemented with 1.5 × 10⁹CFU/kg B. subtilis; BL = basal diet supplemented with 1.5 × 10⁹CFU/kg B. licheniformis.

²The mean represent results from 8 replicate cages per treatment.