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              Open Access  
Copyright: The authors. This article is an open access 
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              Research 
(Published 
online: 07-04-2014) 
              5. Efficacy of different essential oils 
              in modulating rumen fermentation in vitro using buffalo rumen 
              liquor
              
              
              - Debashis Roy, S. K. Tomar,  
              S. K. Sirohi, Vinod Kumar and Muneendra KumarVeterinary World, 7(4):
              
              213-218
 
  
              
   
                
                
doi: 
              10.14202/vetworld.2014.213-218 
                
                
              Debashis Roy: Department of Animal Nutrition, College of 
              Veterinary Science and Animal Husbandry, U.P. Pandit Deen Dayal 
              Upadhyaya Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go Anusandhan 
              Sansthan (DUVASU), Mathura-281001, India 
              S. K. Tomar: Dairy Cattle Nutrition Division, National 
              Dairy Research Institute, Karnal-132001, India 
              S. K. Sirohi: Dairy Cattle Nutrition Division, National 
              Dairy Research Institute, Karnal-132001, India 
              Vinod Kumar: Department of Animal Nutrition, College of 
              Veterinary Science and Animal Husbandry, U.P. Pandit Deen Dayal 
              Upadhyaya Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go Anusandhan 
              Sansthan (DUVASU), Mathura-281001, India 
              Muneendra Kumar: Department of Animal Nutrition, College of 
              Veterinary Science and Animal Husbandry, U.P. Pandit Deen Dayal 
              Upadhyaya Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go Anusandhan 
              Sansthan (DUVASU), Mathura-281001, India 
                
              Received: 25-01-2014, Revised: 03-03-2014, Accepted: 10-03-2014, 
              Published online: 07-04-2014 
              
              Corresponding author: Debashis Roy, email: debashis2k4@gmail.com
 
 
              Abstract 
 
              Aim: Present study was 
              conducted to examine the modulatory effect of different essential 
              oils on rumen fermentation pattern in vitro using wheat straw 
              based diet (concentrate: wheat straw 50:50).Materials and Methods: Four essential oils i.e. cinnamon, 
              garlic, oregano and rosemary oils were tested at concentration of 
              0, 30, 300 and 600 mg/litre (ppm) of total culture fluid using in 
              vitro gas production technique. Total gas production, methane 
              production, nutrient degradability, volatile fatty acid (VFA) 
              production and ammonia nitrogen concentration were studied in 
              vitro using buffalo rumen liquor.
 Results: Results indicated that all four essential oils 
              decreased gas production significantly (P<0.05) at 600ppm 
              concentration. However, in case of garlic oil, 300 ppm 
              concentration was also found to be effective in decreasing total 
              gas production. Reduction in methane production was found maximum 
              (P<0.05) at higher doses in most of the oils. Maximum reduction in 
              methane was noticed with garlic oil at 600ppm dose. Ammonia-N 
              concentration was also decreased significantly (P<0.05) with 
              essential oils and was found minimum with oregano oil at 600 ppm 
              dose. Partition factor was found to be significantly (P<0.05) 
              higher in 600 ppm concentration of garlic and oregano oil. The 
              degradability of dry matter decreased significantly with higher 
              concentration of essential oil in most of treatment combinations.
 Conclusion: Supplementation with different essential oils 
              on wheat straw based diet modulates rumen fermentation and reduced 
              methane and ammonia- N production and improved utilization of 
              nutrients.
 Keywords: ammonia nitrogen, in vitro, essential oils, 
              methane, rumen fermentation.
 
 
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