Effect of 2-Bromoethanesulfonic Acid on in Vitro Fermentation Characteristics and Methanogen Population (Report‪)‬

INTRODUCTION Methane production in the rumen is a nutritionally wasteful process which represents 2 to 15% feed energy loss (Moss, 1993). In addition, methane production by animals, principally ruminants, is estimated to account 15 to 20% of the global production of methane (Crutzen et al., 1986). Therefore, extensive research effort has been made to find ways to reduce methane production in the rumen. Various compounds have been used to decrease ruminal methane production by various methods (Bhatta et al., 2007), and some of examples are: ionophores (Van Nevel and Demeyer, 1988), organic acids (Martin, 1998), fatty acids (Czerkawski et al., 1966; Dohme et al., 2001), plant extracts (Busquet et al., 2005) and halogenated compounds (Martin and Macy, 1985).