Effects of Oregano, Cumin and Sweet orange Essential oils on Chemical Composition and Degradability Coefficients Corn silage in in-vitro Condition

Document Type : Ruminant Nutrition

Authors

Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad,Mashhad, Iran

Abstract

Introduction This study was conducted to evaluate the effect of essential oils of oregano, sweet orange and cumin on chemical composition, parameters of gas production capacity, aerobic stability and degradability of dry matter corn silage carried. Secondary metabolites such as essential oils have antimicrobial properties that by adjusting ruminal fermentation in ruminants to improve the use of nutrients. Oils or extracts of medicinal plants studied could be a viable alternative to Ionophores and antibiotics. While improving energy efficiency and the use of nitrogen in the rumen and reduce the production of methane and nitrogen excretion as environmental pollutants, antibiotic resistance in human pathogens reduced to its minimum Essential oils may be used in ruminant nutrition because silage and rumen fermentation depends on the microbial activity that can be affected by essential oils. Studies show the effects of essential oils on different processes in the rumen. The positive effects of antimicrobial essential oils has led the researchers sought to evaluate the potential of these materials are for controlling and improving rumen fermentation as a method of improving feed efficiency . Given that the effective range of essential oils and their compounds are widespread and many of them have still not been studied, this study was to evaluate these essential oils on ruminal fermentation parameters.

Materials and Methods Corn forage was harvested at 30 to 31% of dry matter (DM) content and chopped with a forage harvester to a theoretical of 50, 100 and 150 mgEOkg−1 DM. To determine dry matter, crude protein, crude fat and ash from the recommended methods AOAC (1990) was used. As well as to determine neutral detergent fiber (NDF) and acid detergent fiber (ADF) of Van Sousse and colleagues Van Soest et al.,(1991) were used. ADF was also the hemicellulose length of 1–2 cm. Essential oil (EO), Cumin (CUM), Oregano (ORE) was dissolved in 0.5 v/v aqueous ethanol and sprayed onto the forage at a rate of 5.56 mL kg−1 silage. The oils were applied to the forage to achieve final concentrations fraction of NDF (Chaves et al., 2012). The concentration of ammonia nitrogen were determined using the method Mu and by device (Kjeltec Auto 1030 Analyzer Tecator). Measurement parameters gas production with the method Menke and. Steingass (1988). Estimates OMD and ME According to equations (Makkar. 2004) were determined. Estimation of short chain fatty acids according to equation Gottschalk (1986) was determined. Determine the parameters of degradability matter in samples studied was by proposed equation Orskov and I. McDonald (1979). The data was analyzed considering a completely randomized design.

Results and Discussion The pH of corn silage treated with oregano 150 and cumin 150 decreased in comparison with control treatment significantly (P

Keywords


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