Baker SK. 1999. Rumen methanogens, and inhibition of methanogenesis. Aust J Agric Res 50:1293–1298.
Balcells J, Aris A, Serrano A, Seradj AR, Crespo J, Devant M. 2012. Effects of an extract of plant flavonoids (
Bioflavex) on rumen fermentation and performance in heifers fed high-concentrate diets. J Anim Sci 90:4975–4984.
Becker PM, Van Wikselaar PG, Franssen MCR, De Vos RCH, Hall RD, Beekwilder J. 2014. Evidence for a hydrogen-sink mechanism of (+) catechin-mediated emission reduction of the ruminant greenhouse gas methane. Metabolomics 10:179–189.
Benchaar C, Petit HV, Berthiaume R, Ouellet DR, Chiquette J, Chouinard PY. 2007. Effects of essential oils on digestion, ruminal fermentation, rumen microbial populations, milk production, and milk composition in dairy cows fed alfalfa silage or corn silage. J Dairy Sci 90:886–897.
Bhatta R, Uyeno Y, Tajima K, Takenaka A, Yabumoto Y, Nonaka I, Enishi O, Kurihara M. 2009. Difference in the nature of tannins on
in vitro ruminal methane and volatile fatty acid production and on methanogenic archaea and protozoal populations. J Dairy Sci 92:5512–5522.
Bodas R, Lopez S, Fernandez M, Garcia-Gonzalez R, Rodrıguez AB, Wallace RJ, Gonzalez JS. 2008.
In vitro screening of the potential of numerous plant species as antimethanogenic feed additives for ruminants. Anim Feed Sci Technol 145:245–258.
Denman SE, McSweeney CS. 2005. Quantitative (real-time) PCR. Methods in Gut Microbial Ecology for Ruminants. Makkar HPS, McSweeney CS, editorsSpringer; Dordrecht, The Netherlands: p. 105–115.
Denman SE, McSweeney CS. 2006. Development of a Real-Time PCR assay for monitoring anaerobic fungal and cellulolytic bacterial populations within the rumen. FEMS Microbiol Ecol 58:572–582.
Denman SE, Tomkins NW, McSweeney CS. 2007. Quantitation and diversity analysis of ruminal methanogenic populations in response to the antimethanogenic compound bromochloromethane. FEMS Microbiol Ecol 62:313–322.
Dohme F, Machmuller A, Wasserfallen A, Kreuzer M. 2001. Ruminal methanogenesis as influenced by individual fatty acids supplemented to complete ruminant diets. Lett Appl Microbiol 32:47–51.
Ellis JL, Kebreab E, Odongo NE, McBride BW, Okine EK, France J. 2007. Prediction of methane production from dairy and beef cattle. J Dairy Sci 90:3456–3467.
Jia Z, Tang M, Wu J. 1999. The determination of flavonoid contents in mulberry and their scavenging effects on superoxide radicals. Food Chem 64:555–559.
Johnson KA, Johnson DE. 1995. Methane emissions from cattle. J Anim Sci 73:2483–2492.
Koike S, Kobayashi Y. 2001. Development and use of competitive PCR assays for the rumen cellulolytic bacteria:
Fibrobacter succinogenes, Ruminococcus albus and
Ruminococcus flavefaciens. FEMS Microbiol Ecol 204:361–366.
Latham MJ, Wolin MJ. 1977. Fermentation of cellulose by
Ruminococcus flavefaciens in the presence and absence of
Methanobacterium ruminantium. Appl Environ Microbiol 34:297–301.
McDougall EI. 1948. Studies on ruminant saliva. 1. The composition and output of sheep’s saliva. Biochem J 43:99–109.
Ntaikou I, Gavala HN, Kornaros M, Lyberatos G. 2008. Hydrogen production from sugars and sweet sorghum biomass using
Ruminococcus albus. Int J Hydrogen Energy 33:1153–1163.
Patra AK, Kamra DN, Agarwa N. 2006. Effect of plant extracts on
in vitro methanogenesis, enzyme activities and fermentation of feed in rumen liquor of buffalo. Anim Feed Sci Technol 128:276–291.
Patra AK, Saxena J. 2010. A new perspective on the use of plant secondary metabolites to inhibit methanogenesis in the rumen. Phytochemistry 71:1198–1222.
Pen B, Sar C, Mwenya B, Kuwaki K, Morikawa R, Takahashi J. 2006. Effects of
Yucca schidigera and
Quillaja saponaria extracts on
in vitro ruminal fermentation and methane emission. Anim Feed Sci Technol 129:175–186.
Institute SAS. 2002. SAS User’s Guide. SAS Institute Inc; Cary, NC, USA:
Skillman LC, Evans PN, Strömpl C, Joblin KN. 2006. 16S rDNA directed PCR primers and detection of methanogens in the bovine rumen. Lett Appl Microbiol 42:222–228.
Skillman LC, Toovey AF, Williams AJ, Wright AG. 2006. Development and validation of a real-time PCR method to quantify rumen protozoa and examination of variability between
Entodinium populations in sheep offered a hay-based diet. Appl Environ Microbiol 72:200–206.
Tedesco D, Tava A, Galletti S, Tameni M, Varisco G, Costa A, Steidler S. 2004. Effects of silymarin, a natural hepatoprotector, in periparturient dairy cows. J Dairy Sci 87:2239–2247.
Theodorou MK, Williams BA, Dhanoa MS, McAllan AB, France J. 1994. A simple gas production method using a pressure transducer to determine the fermentation kinetics of ruminant feeds. Anim Feed Sci Technol 48:185–197.
Velioglu YS, Mazza G, Cao L, Oomah BD. 1998. Antioxidant activity and total phenolics in selected fruit, vegetables, and grain products. J Agric Food Chem 46:4113–4117.
Zhou Z, Meng Q, Yu Z. 2011. Effects of methanogenic inhibitors on methane production and abundances of methanogens and cellulolytic bacteria in
in vitro ruminal cultures. Appl Environ Microbiol 77:2634–2639.