Table 2.

Effect of dietary chestnut wood extract supplementation on growth performance in broilers.¹

Item	CON	CTC	CWE	SEM	P value
Starter phase (day 0–day 21)
Initial body weight (g)	46.92	46.32	46.54	0.44	0.611
Final body weight (g)	573.72	566.12	549.57	10.26	0.410
Average daily weight gain (g)	27.32	26.96	26.17	0.94	0.842
Average daily feed intake (g)	36.99	36.42	35.22	0.98	0.454
Feed-to-gain ratio (g/g)	1.35	1.35	1.34	0.02	0.941
Finisher phase (day 21–day 42)
Initial body weight (g)	573.72	566.12	549.57	10.26	0.410
Final body weight (g)	1993.1b	2067.2a	2028.9a	27.58	0.038
Average daily weight gain (g)	67.59b	71.48a	70.44a	1.20	0.022
Average daily feed intake (g)	105.14	104.77	101.91	2.97	0.715
Feed-to-gain ratio (g/g)	1.56a	1.47b	1.45b	0.04	0.032
Overall period (day 0–day 42)
Average daily weight gain (g)	47.46	49.22	48.31	0.63	0.063
Average daily feed intake (g)	71.07	70.60	68.57	1.66	0.832
Feed-to-gain ratio (g/g)	1.49	1.43	1.41	0.03	0.264

^a,bValues with different superscripts within the same row indicate a significant difference at P < 0.05.

SEM, pooled standard error of the means. Level of significance at P < 0.05.

Abbreviations: CON, control; CTC, antibiotic (chlortetracycline); CWE, chestnut wood extract.

¹Data represented the mean value of 56 broilers per treatment.