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    • IJAFR, volume 52, no1, 2013
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    • Irish Journal of Agricultural & Food Research
    • IJAFR, volume 52, no1, 2013
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    How much grassland biomass is available in Ireland in excess of livestock requirements?

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    Author
    McEniry, Joseph
    Crosson, Paul
    Finneran, Eoghan
    McGee, Mark
    Keady, Tim
    O'Kiely, Padraig
    Keyword
    Alternative applications
    Biomass yield
    Grass
    Silage
    Date
    2013
    
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    URI
    http://hdl.handle.net/11019/451
    Citation
    J. McEniry, P. Crosson, E. Finneran, M. McGee, T.W.J. Keady and P. O’Kiely. How much grassland biomass is available in Ireland in excess of livestock requirements? Irish Journal of Agricultural and Food Research, 2013, 52, 67–80
    Abstract
    Grassland is a dominant biomass resource in Ireland and underpins most animal production systems. However, other commercial uses for grassland biomass exist, including, for example, the production of biogas through anaerobic digestion for the generation of heat, electricity and transport fuel. The objective of this study was to estimate the annual grassland resource available in Ireland in excess of livestock requirements under six contrasting scenarios. Under current grassland management and production practices there is an estimated average annual grassland resource of ca. 1.7 million tonnes of dry matter (DM) available in excess of livestock requirements. Only a small proportion of this resource (0.39 million tonnes of DM per annum) would be available if the targets set out in ‘Food Harvest 2020’ were achieved. However, increasing nitrogen (N) fertiliser input (to the limit permitted by the E.U. Nitrates Directive) combined with increasing the grazed grass utilisation rate of cattle (from 0.60 to 0.80 kg DM ingested by livestock per kg DM grown) has the potential to significantly increase this average resource to 12.2 million t DM/annum, even when allowing for achievement of ‘Food Harvest 2020’ targets. Under these scenarios, alternative uses for grassland biomass such as anaerobic digestion and green biorefining would not compete with traditional dairy, beef and lamb production systems, but could provide an alternative enterprise and income to farmers.
    Funder
    Department of Agriculture, Food and the Marine
    Grant Number
    RSF 07 557
    Collections
    Grassland Science
    Livestock Systems
    IJAFR, volume 52, no1, 2013

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