Volume 16, Issue 7 (2014)                   JAST 2014, 16(7): 1543-1554 | Back to browse issues page

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Jahani-Azizabadi H, Danesh Mesgaran M, Vakili A, Rezayazdi K. Effect of Some Plant Essential Oils on In vitro Ruminal Methane Production and on Fermentation Characteristics of a Mid-forage Diet. JAST 2014; 16 (7) :1543-1554
URL: http://jast.modares.ac.ir/article-23-1814-en.html
1- Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, P. O. Box: 91775-1163, Mashhad, Islamic Republic of Iran.
2- Department of Animal Science, Faculty of Agriculture, University of Tehran, Karaj, Tehran, Islamic Republic of Iran.
Abstract:   (8053 Views)
The objective of the present study was to investigate the effect of different doses of some 7 natural semi-arid medicinal plants’ essential oils on in vitro ruminal digestion and fermentation patterns of a mid-forage (alfalfa hay: concentrates, 1:1) diet. Treatments consisted of either basal diet alone (control) or added with 35, 70, 140 or 280 µl L-1 of coriander, oregano, caraway, cumin, cinnamon, pistachio hull and thyme essential oils, incubated for 24 hours at 38.7ºC. The essential oils of cinnamon and pistachio applied as 280 µl L-1 and thyme applied at 140 and 280 µl L-1 caused a decrease in DM disappearance as compared with control. Thyme and pistachio essential oils (used at 280 µl L-1) resulted in a decrease of NDF disappearance, while caraway (70 µl L-1) and cumin (140 µl L-1) resulted in an increase in it (14.8% and +18.2%, respectively). Relative to control, the essential oils applied, did not significantly affect the medium N-NH3 concentration (except thyme at 140 and 280 µl L-1), pH (except thyme and cumin essential oils, 6.41 and 6.22 vs. 6.3, respectively), gas produced (except thyme at 280 µl L-1) and Feed Fermentation Efficiency (FFE). Relative to control, addition of all the essential oils resulted in a decrease of CP disappearance and CH4 (except for cumin) production as Mm-1 incubated. Findings revealed that these essential oils may allow manipulation of rumen microbial fermentation.
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Received: 2013/07/29 | Accepted: 2014/04/12 | Published: 2014/11/1

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