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    Evaluation of Lolium perenne L. cv. AberDart and AberDove for silage production

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    Author
    Conaghan, Patrick
    O'Kiely, Padraig
    Howard, H.
    O'Mara, Frank P.
    Halling, M.A.
    Keyword
    Ensilability
    Nutritional value
    Perennial ryegrass
    Water-soluble carbohydrate
    Yield
    Date
    2008
    
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    URI
    http://hdl.handle.net/11019/627
    Citation
    P. Conaghan, P. O’Kiely, H. Howard, F.P. O’Mara and M.A. Halling. Evaluation of Lolium perenne L. cv. AberDart and AberDove for silage production. Irish Journal of Agricultural and Food Research 47: 119–134, 2008
    Abstract
    The objective of this study was to assess the value, for silage production, of intermediateheading Lolium perenne L. cultivars, AberDart and AberDove (diploid), bred for increased water-soluble carbohydrate (WSC) concentrations, relative to four control cultivars (Fennema, AberElan and Spelga (diploid), and Greengold (tetraploid)). Cultivars were evaluated for forage dry matter (DM) yield, ground cover and indirect laboratory measures of nutritional value and ensilability over 3 harvest years within intensive silage-production systems. AberDove was the most desirable diploid for silage production producing on average 316 kg/ha higher (2%) DM yield per annum, having a 10 g/kg higher (1%) dry matter digestibility (DMD) and, based primarily on a 6 g/L higher (19%) concentration of WSC expressed in the aqueous extract (WSCAE), offered the greatest potential to produce well preserved silage. Ensiling AberDart compared to the diploid controls offered a slightly greater probability of producing well preserved silage based on a modest increase of 2 g/L (6%) in WSCAE concentration. The dilemma for silage production is that AberDart, on average produced 558 kg/ha less (4%) DM yield per annum but had a greater (1%) DMD of 6 g/kg than the diploid controls. The tetraploid control had, on average, 13 and 8 g/kg higher (2% and 1%, respectively) DMD than AberDart and AberDove, but at a cost of lower ensilability with lower (6% and 21%, respectively) WSCAE values of 2 and 6 g/L. In its favour, the tetraploid control outyielded AberDart by, on average, 917 kg/ha DM per annum (7%) and produced comparable yields to AberDove. Final ground cover ratings were high (≥ 95%) for all cultivars. Evaluation of nutritional value and ensilability offers further grounds to differentiate and select cultivars for animal production potential.
    Funder
    European Union; Teagasc Walsh Fellowship Programme
    Grant Number
    QLK5-CT-2001-0498
    Collections
    IJAFR volume 47, 2008
    Grassland Science

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