Table 5.

The effect of Silymarin supplementation on the gas emission of broilers

Items	Silymarin				SEM	p-value
	0%	0.02%	0.04%	0.06%		Linear	Quadratic
d 35 (ppm)
NH3	13.2	13.0	12.3	11.8	1.8	0.316	0.756
H2S	1.1	1.3	1.0	1.1	0.2	0.068	0.512
Methyl mercaptans	7.4a	7.4a	3.3b	4.3b	1.6	0.039	0.485
CO2	1,225	1,275	1,150	1,000	110	0.104	0.634
Acetic acid	1.4a	1.5a	1.2b	1.2b	0.2	0.007	0.903

SEM, standard error of means.

^a,bMeans in the same row with different superscripts differ (p<0.05).