Table 2. Rumen CH₄ emission in steers fed high concentrate diets (80% DM basis) with or without GOS, L-cysteine or monensin

	Control	GOS	L-Cysteine	Monensin	SEM	p-value
CH4 (L d−1)	98.1a	90.8bc	95.9ab	80.6c	3.37	0.003

Means within a row with different superscripts differ (p < 0.05).
DM, dry matter; GOS, galacto-oligosaccharides.