Ando S, Nishida T, Ishida M, Hosoda K, Bayaru E. 2003. Effect of peppermint feeding on the digestibility, ruminal fermentation and protozoa. Livest Prod Sci 82:245–248.
AOAC. 1995. Official Methods of Analyses. 16th edAnimal Feeds. Association of Official Analytical Chemists; Arlington, VA, USA:
Benchaar C, Greahead H. 2011. Essential oils and opportunities to mitigate enteric methane emissions from ruminants. Anim Feed Sci Technol 166–167:338–355.
Bencharr C, Petit HV, Berthiaume R, Whyte TD, Chouinard PY. 2006. Effects of addition of essential oils and monensin premix on digestion, ruminal fermentation, milk production, and milk composition in dairy cows. J Dairy Sci 89:4352–4364.
Boadi D, Benchaar C, Chiquette J, Masse D. 2004. Mitigation strategies to reduce enteric methane emissions from dairy cows: Update review. Can J Anim Sci 84:319–335.
Brooker MIH, Kleinig DA. 2006. Field Guide to Eucalyptus. Vol.1. South-eastern Australia. Third editionBloomings; Melbourne, Australia:
Calabrò S, Infascelli F, Tudisco R, Musco N, Grossi M, Monastra G, Cutrignelli MI. 2013. Estimation of in vitro methane production in buffalo and cow. Buff Bull 32:Special Issue 2924–927.
Cardozo PW, Calsamiglia S, Ferret A, Kamel C. 2006. Effects of alfalfa extract, anise, capsicum, and a mixture of cinnamaldehyde and eugenol on ruminal fermentation and protein degradation in beef heifers fed a high-concentrate diet. J Anim Sci 84:2801–2808.
Castillejos L, Calsamiglia S, Ferret A. 2006. Effect of essential oil active compounds on rumen microbial fermentation and nutrient flow in
in vitro system. J Dairy Sci 89:2649–2658.
Castillejos L, Calsamiglia S, Ferret A, Losa R. 2007. Effects of dose and adaptation time of a specific blend of essential oil compounds on rumen fermentation. Anim Feed Sci Technol 132:186–201.
Chaves AV, Stanford K, Dugan MER, Gibson LL, McAllister TA, Van Herk F, Benchaar C. 2008. Effects of cinnamaldehyde, garlic and juniper berry essential oils on rumen fermentation, blood metabolites, growth performance, and carcass characteristics of growing lambs. Livest Sci 117:215–224.
Chen XB, Gomes MJ. 1995. Estimation of microbial protein supply to sheep and cattle based on urinary excretion of purine derivative—An overview of the technique details. Occasional publication 1992. International Feed Resources Unit, Rowett Research Institute; Aberdeen, UK:
Chen XB, Kyle DJ, Orskov ER. 1993. Measurement of allantoin in urine and plasma by high-performance liquid chromatography with pre-column derivatization. J Chromatogr B Biomed Sci Appl 617:241–247.
Crocker CL. 1967. Rapid determination of urea nitrogen in serum or plasma without deproteinization. Am J Med Technol 33:361–365.
Cutrignelli MI, Piccolo G, D’Urso S, Calabrò S, Bovera F, Tudisco R, Infascelli F. 2007. Urinary excretion of purine derivatives in dry buffalo and Fresian cows. Ital J Anim Sci 6:563–566.
Elaissi A, Rouis Z, Salem NBA, Mabrouk S, Salem YB, Salah KBH, Aouni M, Farhat F, Chemli R, Harzallah-Skhiri F, Khouja ML. 2012. Chemical composition of 8 eucalyptus species’ essential oils and the evaluation of their antibacterial, antifungal and antiviral activities. BMC Complement Altern Med 12:81
Fraser GR, Chaves AV, Wang Y, McAllister TA, Beauchemin KA, Benchaar C. 2007. Assessment of the effects of cinnamon leaf oil on rumen microbial fermentation using two continuous culture systems. J Dairy Sci 90:2315–2328.
Galyean M. 1989. Laboratory procedure in animal nutrition research. Department of animal and range science. New Mexico State University; Las Cruces, NM, USA: p. 107–122.
Giannenas I, Skoufos J, Giannakopoulos C, Wiemann M, Gortzi O, Lalas S, Kyriazakis I. 2011. Effects of essential oils on milk production, milk composition, and rumen microbiota in Chios dairy ewes. J Dairy Sci 94:5569–5577.
Guglielmelli A, Calabrò S, Cutrignelli M, Gonzalez O, Infascelli F, Tudisco R, Piccolo V. 2010. In vitro fermentation and methane production of fava and soy beans. EAAP Scientific Series 127:1457–460.
Hungate RE. 1969. A Role Tube Method for Cultivation of strict Anaerobes Method in Microbiology. Norris JR, Ribbons DW, editorsAcademic Press; New York, NY, USA: p. 313
Liang JB, Matsumoto M, Young BA. 1994. Purine derivative excretion and ruminal microbial yield in Malaysian cattle and swamp buffalo. Anim Feed Sci Technol 47:189–199.
Manh NS, Wanapat M, Uriyapongson S, Khejornsart P, Chanthakhoun V. 2012. Effect of eucalyptus (Camaldulensis) leaf meal powder on rumen fermentation characteristics in cattle fed on rice straw. Afr J Agric Res 7:131997–2003.
Moss AR, Jouany JP, Newbold J. 2000. Methane production by ruminants: its contribution to global warming. Ann Zootech 49:231–253.
Newbold CJ, McInstosh FM, Williams P, Losa R, Wallace RJ. 2004. Effects of a specific blend of essential oil compounds on rumen fermentation. Anim Feed Sci Technol 114:105–112.
Patra AK, Saxena J. 2009. Dietary phytochemicals as rumen modifiers: A review of the effects on microbial populations. Antonie Van Leeuwenhoek 96:363–375.
Patra AK, Kamra DN, Agarwal N. 2010. Effects of extracts of spices on rumen methanogenesis, enzyme activities and fermentation of feeds
in vitro. J Sci Food Agric 90:511–520.
Salem AZM, Salem MZM, El-Adawy MM, Robinson PH. 2006. Nutritive evaluations of some browse tree foliages during the dry season: Secondary compounds, feed intake and
in vivo digestibility in sheep and goats. Anim Feed Sci Technol 127:251–267.
Sallam SMA, Bueno ICS, Nasser MEA, Abdalla AL. 2010. Effect of eucalyptus (Eucalyptus citriodora) fresh or residue leaves on methane emission in vitro. Ital J Anim Sci 9:e58
Sallam SMA, Nasser MEA, Araujo RC, Abdalla AL. 2009. Methane emission in vivo by sheep consuming diet with different levels of eucalyptus essential oil. In : In proc FAO/IAEA Int. Symp. on sustainable improvement of animal production and health; Vienna, Autralia. p. 210–211.
Samuel M, Sagathewan S, Thomas J, Mathen G. 1997. An HPLC method for estimation of volatile fatty acids of ruminal fluid. Indian J Anim Sci 67:805–807.
Santos MB, Robinson PH, Williams P, Losa R. 2010. Effects of addition of an essential oil complex to the diet of lactating dairy cows on whole tract digestion of nutrients and productive performance. Anim Feed Sci Technol 157:64–71.
SAS. 1998. SAS/STAT User’s Guid 6. 12th edSAS Institue Inc; Cary, NC, USA:
Steel RGD, Torrie JH. 1980. Principles and procedures of statistics: A biometrical approach. 2nd edMcGraw-Hill Book Company; New York, NY, USA:
Van Soest PJ, Robertson JB, Lewis BA. 1991. Methods for dietary fiber, neutral detergent fiber and non-starch polysaccharides in relation to animal nutrition. J Dairy Sci 74:3583–3597.
Wallace RJ, Colombatto D, Robinson PH. 2008. Enzymes, direct-fed microbials and plant extracts in ruminant nutrition. Anim Feed Sci Technol 145:1–4.
Wanapat M, Kang S, Phetsatcha K. 2013b. Enhancing buffalo production efficiency through rumen manipulation and nutrition. Buffalo Bull 32:Special Issue 1258–275.
Wanapat M, Kang S, Hankla N, Phesatcha K. 2013d. Effect of rice straw treatment on feed intake, rumen fermentation and milk production in lactating dairy cows. Afr J Agric Res 8:1677–1687.
Wanapat M, Chanthakhoun V, Phesatcha K, Kang S. 2014. Influence of mangosteen peel powder as a source of plant secondary compounds on rumen microorganisms, volatile fatty acids, methane and microbial protein synthesis in swamp buffaloes. Livest Sci 162:126–133.
Wang CJ, Wang SP, Zhou H. 2009. Influences of flavomycin, ropadiar, and saponin on nutrient digestibility, rumen fermentation, and methane emission from sheep. Anim Feed Sci Technol 148:157–166.