. 2022 Feb 22;12:798350. doi: 10.3389/fmicb.2021.798350

TABLE 2.

Effect of dietary supplementation of Bacillus subtilis ATCC19659 on the broiler’s growth performance.

Items¹	Treatments²					SEM	p-value
	CON	ZnB	BS-1	BS-3	BS-5
(1–21 days)
1 day (g)	47.08	47.32	47.05	47.49	47.14	0.172	0.915
21 day (g)	641.6^bc	621.31^c	646.04^abc	657.36^ab	670.54^a	4.164	0.004
ADFI (g/day)	40.13	40.28	42.79	43.85	42.71	0.601	0.185
ADG (g/day)	28.27^bc	27.28^c	28.59^ab	29.07^ab	29.62^a	0.22	0.004
FCR (g/g)	1.42	1.48	1.5	1.51	1.44	0.021	0.653
Survivability rates (%)	99.17	98.33	98.33	97.5	99.17	0.49	0.826

(21–42 days)
42 day (g)	1600.39^ab	1,578.24^b	1,620.1^ab	1,652.0^a	1,636.98^a	8.305	0.041
ADFI (g/day)	87.67	86.65	89.95	90.57	88.35	0.905	0.664
ADG (g/day)	50.48	50.33	51.37	52.55	51.35	0.555	0.755
FCR (g/g)	1.74	1.73	1.75	1.73	1.72	0.0134	0.96
Survivability rates (%)	96.67	99.17	100	98.33	99.17	0.48	0.225

(1–42)
ADFI (g/day)	62.71	62.30	65.2	66.06	64.39	0.646	0.305
ADG (g/day)	38.82	38.22	39.41	40.22	39.94	0.295	0.189
FCR (g/g)	1.62	1.63	1.65	1.64	1.61	0.01	0.65
Survivability rates (%)	95.83	97.5	98.33	95.83	98.33	0.746	0.710

¹ADG, average daily body gain; ADFI, average daily feed intake; FCR (g/g), ADFI (g/day)/ADG (g/day).

²CON, chicks were fed a corn- and soybean-based diet; ZnB, chicks were fed basal diet containing 500 mg ZnB/kg; BS-1, chicks were fed basal diet containing 1 × 10⁸ CFU/g feed of BS-ATCC19659; BS-3, chicks were fed basal diet containing 3 × 10⁸ CFU/g feed of BS-ATCC19659; BS-5, chicks were fed basal diet containing 5 × 10⁸ CFU/g feed of BS-ATCC19659.

^a,b,cValues in the same row with different letter superscripts mean significant differences (p < 0.05). Data are presented as the mean ± SEM (n = 6).