Table 5.
Effects of dietary enzyme and microorganism on noxious gas emission in broiler chickens

Treatment	Control	0.1% EZ1	0.2% EZ	M2	MW3
O2 (%)	17.43±1.23	17.58±1.81	18.08±0.81	17.47±1.45	18.2±0.94
CO2 (%)	2.60±1.02	2.79±1.52	2.15±0.87	2.77±1.21	2.07±0.76
CH4 (%)	0.01±0.01	0.02±0.01	0.02±0.01	0.02±0.01	0.03±0.01
NH3 (ppm)	15.20±3.89ab	17.20±5.27a	9.00±3.66ab	10.75±1.89ab	3.80±1.28b
H2S (ppm)	ND4	0.33±0.21	0.17±0.17	ND	ND

EZ, 0.1%, 0.2% enzyme added to feed.
M, 2% microorganism added to feed.
MW, 2% of microorganism added to feed and water.
Values are Mean ± SE.
Values with different superscripts within same row are significantly different (P<0.05).