{"title":"Effects of Specific Essential Oil Compounds on, Feed Intake, Milk Production, and Ruminal Environment in Dairy Cows during Heat Exposure","authors":"K. Reza-Yazdi, M. Fallah, M. Khodaparast, F. Kateb, M. Hosseini-Ghaffari","volume":96,"journal":"International Journal of Animal and Veterinary Sciences","pagesStart":1394,"pagesEnd":1398,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10000027","abstract":"<p>The objective of this study was to determine effect of<br \/>\r\ndietary essential oil (EO) compounds, which contained<br \/>\r\ncinnamaldehyde, eugenol, peppermint, coriander, cumin, lemongrass,<br \/>\r\nand an organic carrier on feed intake, milk composition, and rumen<br \/>\r\nfermentation of dairy cows during heat exposure. Thirty-two Holstein<br \/>\r\ncows (days in milk= 60 &plusmn; 5) were assigned to one of two treatment<br \/>\r\ngroups: a Control and EO fed. The experiment lasted 28 days. Dry<br \/>\r\nmatter intake (DMI) was measured daily while and milk production<br \/>\r\nwas measured weekly. Our result showed that DMI and milk yield<br \/>\r\nwas decreased (P &lt; 0.01) in control cows relative to EO cows.<br \/>\r\nFurthermore, supplementation with EO was associated with a<br \/>\r\ndecrease in the molar proportion of propionate (P &lt; 0.05) and<br \/>\r\nincrease (P &lt; 0.05) in acetate to propionate ratio. In conclusion, EO<br \/>\r\nsupplementations in diets can be useful nutritional modification to<br \/>\r\nalleviate for the decrease DMI and milk production during heat<br \/>\r\nexposure in lactating dairy cows.<\/p>\r\n","references":"[1] R. J. Wallace, \u201cAntimicrobial properties of plant secondary\r\nmetabolites,\u201d Proceedings of the Nutrition Society, vol. 63, pp. 621\u2013629,\r\n2004.\r\n[2] M. B. Santos, P. H. Robinson, P. Williams, and R. 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