Table 2.

Effects of dietary supplementation with combination of zeolite and attapulgite (ZA) on growth performance of broiler chickens in experiment 1 and 2

Items	Period (d)	Control	Treatment	p value
Experiment 1
Initial weight (g/bird)		46.25±0.2	46.33±0.18	0.748
BWG (g/bird)	1–21	713.07±25.62	692.91±16.99	0.508
	22–42	1,636.20±46.26	1,700.10±20.88	0.089
	1–42	2,349.30±65.18	2,394.00±14.02	0.131
FI (g/bird)	1–21	1,067.22±23.59	1,058.61±11.53	0.34
	22–42	3,153.15±45.56	3,387.30±38.56	0.007
	1–42	4,220.58±34.45	4,445.70±37.84	0.008
FCR (feed:gain, g/g)	1–21	1.51±0.05	1.52±0.02	0.856
	22–42	1.96±0.04	2.01±0.02	0.304
	1–42	1.81±0.02	1.85±0.01	0.150
Experiment 2
Initial weight (g/bird)		39.15±0.15	39.23±0.21	0.785
BWG (g/bird)	1–21	565.38±13.27	629.29±5.43	0.038
	22–42	1,607.90±53.78	1,747.30±57.01	0.092
	1–42	2,173.30±43.04	2,376.60±53.84	0.07
FI (g/bird)	1–21	849.85±12.60	944.05±29.82	0.081
	22–42	3,318.90±91.42	3,535.10±65.36	0.109
	1–42	4,064.70±136.83	4,389.00±73.19	0.062
FCR (feed:gain, g/g)	1–21	1.50±0.01	1.50±0.04	0.929
	22–42	2.06±0.01	2.03±0.04	0.411
	1–42	1.87±0.02	1.85±0.03	0.499

BWG, body weight gain; FI, feed intake; FCR, feed conversion ratio.