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    Manipulating the ensilage of wilted, unchopped grass through the use of additive treatments

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    Author
    McEniry, Joseph
    O'Kiely, Padraig
    Clipson, Nicholas J.W.
    Forristal, P.D.
    Doyle, Evelyn M.
    Keyword
    Additive
    Baled silage
    Precision-chop silage
    Date
    2007
    
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    URI
    http://hdl.handle.net/11019/625
    Citation
    J. McEniry, P. O’Kiely, N.J.W. Clipson, P.D. Forristal and E.M. Doyle. Manipulating the ensilage of wilted, unchopped grass through the use of additive treatments. Irish Journal of Agricultural and Food Research 46: 77–91, 2007
    Abstract
    Baled silage composition frequently differs from that of comparable conventional precision-chop silage. The lower final concentration of fermentation products in baled silage makes it more conducive to the activities of undesirable microorganisms. Silage additives can be used to encourage beneficial microbial activity and/or inhibit detrimental microbial activity. The experiment was organised in a 2 (chop treatments) × 6 (additive treatments) × 2 (stages of ensilage) factorial arrangement of treatments (n = 3 silos/treatment) to suggest additive treatments for use in baled silage production that would help create conditions more inhibitory to the activities of undesirable microorganisms and realise an outcome comparable to precision-chop silage. Chopping the herbage prior to ensiling, in the absence of an additive treatment, improved the silage fermentation. In the unchopped herbage, where the fermentation was poorer, the lactic acid bacterial inoculant resulted in an immediate increase (P < 0.001) in lactic acid concentration and a faster decline (P < 0.001) in pH with a subsequent reduction in butyric acid (P < 0.001) and ammonia-N (P < 0.01) concentrations. When sucrose was added in addition to the lactic acid bacterial inoculant, the combined treatment had a more pronounced effect on pH, butyric acid and ammonia-N values at the end of ensilage. The formic acid based additive and the antimicrobial mixture restricted the activities of undesirable microorganisms resulting in reduced concentrations of butyric acid (P < 0.001) and ammonia-N (P < 0.01). These additives offer a potential to create conditions in baled silage more inhibitory to the activities of undesirable microorganisms.
    Funder
    Teagasc Walsh Fellowship Programme
    Collections
    Crop Science
    Grassland Science
    IJAFR volume 46, 2007
    IJAFR volume 46, 2007
    IJAFR volume 46, 2007

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