1. Dibner JJ, Richards JD. Antibiotic growth promoters in agriculture: history and mode of action. Poult Sci 2005; 84:634–43.
2. Drlica KS, Perlin DS. Antibiotic resistance: understanding and responding to an emerging crisis. Upper Saddle River, NJ: FT Press Science; 2011.
3. Wallace RJ. Antimicrobial properties of plant secondary metabolites. Proc Nutr Soc 2004; 63:621–9.
4. Ogbodo SO, Okeke AC, Ugwuoru CDC, Chukwurah EF. Possible alternatives to reduce antibiotic resistance. Life Sci Med Res 2011; LSMR-24:1–9.
5. Yitbarek MB. Phytogenics as feed additives in poultry production: a review. Int J Ext Res 2015; 3:49–60.
7. Lora JH, Glasser WG. Recent industrial applications of lignin: a sustainable alternative to nonrenewable materials. J Polym Environ 2002; 10:39–48.
8. Gosselink RJA, de Jong E, Guran B, Abherli A. Co-ordination network for lignin—standardisation, production and applications adapted to market requirements (EUROLIGNIN). Ind Crop Prod 2004; 20:121–9.
10. Ugartondo V, Mitjans M, Vinardell MP. Comparative antioxidant and cytotoxic effects of lignins from different sources. Bioresource Technol 2008; 99:6683–7.
11. Dong X, Dong MD, Lu YJ, et al. Antimicrobial and antioxidant activities of lignin from residue of corn stover to ethanol production. Ind Crop Prod 2011; 34:1629–34.
12. Ayyachamy M, Cliffe FE, Coyne JM, Collier J, Tuohy MG. Lignin: untapped biopolymers in biomass conversion technologies. Biomass Conv Bioref 2013; 3:255–67.
13. Phillip LE, Idziak ES, Kubow S. The potential use of lignin in animal nutrition, and in modifying microbial ecology of the gut. In : Proc 45th East Nutr Conf; 2000 May 13–14; Montreal, Quebec, Canada. Animal Nutrition Association of Canada; 2000. p. 165–84.
14. Wang Y, Marx T, Lora J, McAllister TA, Phillip LE. Effects of purified lignin on
in vitro ruminal fermentation and on growth performance, carcass traits and fecal shedding of
Escherichia coli by feedlot lambs. Anim Feed Sci Technol 2009; 151:21–31.
15. Lora JH. Industrial commercial lignins: sources, properties and applications. Belgacem MN, Gandinin A, editorsMonomers, Polymers and Composites from Renewable Materials. Oxford, UK: Elsevier; 2009. p. 225–42.
16. Wang Y, Xu Z, Bach SJ, McAllister TA. Effects of phlorotannins from
Ascophyllum nodosum (brown seaweed) on ruminal digestion of forage and concentrate diets
in vitro. Anim Feed Sci Technol 2008; 145:375–95.
17. Menke KH, Raab L, Salewski A, et al. The estimation of the digestibility and metabolizable energy content of ruminant feedingstuffs from the gas production when they are incubated with rumen liquor
in vitro. J Agric Sci (Cambr) 1979; 93:217–22.
18. Canadian Council on Animal Care (CCAC). Guide to the Care and Use of Experimental Animals. 1E:Olfert D, Cross BM, McWilliam AA, editorsOttawa, ON: 2009.
19. Fedorak PM, Hrudey SE. A simple apparatus for measuring gas production by methanogenic culture in serum bottles. Environ Technol Lett 1983; 4:425–32.
20. Kouazounde J, Jin L, Assogba F, et al. Effects of essential oils from medicinal plants acclimated to Benin on
in vitro ruminal fermentation of grass. J Sci Food Agric 2015; 95:1031–8.
21. NRC. Nutrient requirements of beef cattle. 7th edWashington, DC: Natl Acad Sci Press; 1996.
22. Bailey DRC, Entz T, Fredeen HT, Rahnefeld GW. Operator and machine effects on ultrasonic measurements of beef cows. Livest Prod Sci 1988; 18:305–9.
23. Van Soest PJ, Robertson JB, Lewis BA. Methods for dietary fibre, neutral detergent and non-starch polysaccharides in relation to animal nutrition. J Dairy Sci 1991; 74:3583–97.
24. Herrera-Saldana RE, Huber JT, Poore MH. Dry matter, crude protein and starch degradability of five cereal grains. J Dairy Sci 1990; 73:2386–93.
25. Chaves AV, Thompson LC, Iwaasa AD, et al. Effect of pasture type (alfalfa vs. grass) on methane and carbon dioxide production by yearling beef heifers. Can J Anim Sci 2006; 86:409–18.
26. SAS Institute. SAS User’s Guide. Statistics. Cary, NC: SAS Inst, Inc; 2009.
27. Jung HG. Inhibition of structural carbohydrate fermentation by forage phenolics. J Sci Food Agric 1985; 36:74–80.
28. Hartley RD, Akin DE. Effect of forage cell wall phenolic acids and derivatives on rumen microflora. J Sci Food Agric 1989; 49:405–11.
31. Beauchemin KA, Kreuzer M, O’Mara F, McAllister TA. Nutritional management for enteric methane abatement: a review. Aust J Exp Agric 2008; 48:21–7.
32. Øskov ER, Flatt WP, Moe PW. Fermentation balance approach to estimate extent of fermentation and efficiency of volatile fatty acids formation in ruminants. J Dairy Sci 1968; 51:1429
33. Goatcher WD, Church DC. Taste responses in ruminants. 4. Reactions of pygmy goats, normal goats, sheep and cattle to acetic acid and quinine hydrochloride. J Anim Sci 1970; 31:373–82.
34. Valencia Z, Chavez ER. Lignin as a purified dietary fiber supplement for piglets. Nutr Res 1997; 17:1517–27.
35. Baurhoo B, Phillip L, Ruiz-Feria CA. Effects of purified lignin and mannanoligosaccharides on intestinal integrity and microbial populations in the ceca and litter of broiler chickens. Poult Sci 2007; 86:1070–8.
36. Ricke SC, Van der Aar PJ, Fahey GC, Berger L. Influence of dietary fibres on performance and fermentation characteristics of gut contents from growing chicks. Poult Sci 1982; 61:1335–43.
37. Yu B, Tsai CC, Hsu JC, Chiou PW. Effect of different sources of dietary fibre on growth performance, intestinal morphology and caecal carbohydrases of domestic geese. Br Poult Sci 1998; 39:560–7.