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    • IJAFR volume 55, no 1. 2016
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    • Irish Journal of Agricultural & Food Research
    • IJAFR volume 55, no 1. 2016
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    The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland

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    Author
    Hyde, Bernard
    Forrestal, Patrick J.
    Jahangir, Mohammad M. R.
    Ryan, Michael
    Fanning, A.
    Carton, Owen T.
    Lanigan, Gary
    Richards, Karl G.
    Keyword
    calcium ammonium nitrate fertiliser;
    disaggregated emission factors;
    dung
    nitrous oxide
    urine
    Date
    08/09/2016
    
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    URI
    http://hdl.handle.net/11019/1138
    Citation
    Hyde, B., Forrestal, P., Jahangir, M., et al. (2016). The interactive effects of fertiliser nitrogen with dung and urine on nitrous oxide emissions in grassland. Irish Journal of Agricultural and Food Research, 55(1), pp. 1-9, doi:10.1515/ijafr-2016-0001
    Abstract
    Nitrous oxide (N2O) is an important and potent greenhouse gas (GHG). Although application of nitrogen (N) fertiliser is a feature of many grazing systems, limited data is available on N2O emissions in grassland as a result of the interaction between urine, dung and fertiliser N. A small plot study was conducted to identify the individual and interactive effects of calcium ammonium nitrate (CAN) fertiliser, dung and urine. Application of CAN with dung and urine significantly increased the mass of N2O-N emission. Importantly, the sum of N2O-N emitted from dung and CAN applied individually approximated the emission from dung and CAN fertiliser applied together, that is, an additive effect. However, in the case of urine and CAN applied together, the emission was more than double the sum of the emission from urine and CAN fertiliser applied individually, that is, a multiplicative effect. Nitrous oxide emissions from dung, urine and fertiliser N are typically derived individually and these individual emission estimates are aggregated to produce estimates of N2O emission. The presented findings have important implications for how individual emission factors are aggregated; they suggest that the multiplicative effect of the addition of CAN fertiliser to urine patches needs to be taken into account to refine the estimation of N2O emissions from grazing grasslands.
    Funder
    Environmental Protection Agency; Department of Agriculture, Food and the Marine, Ireland
    Grant Number
    RSF 13S430; 11S138
    ae974a485f413a2113503eed53cd6c53
    https://doi.org/10.1515/ijafr-2016-0001
    Scopus Count
    Collections
    Environment, Soils & Land Use
    IJAFR volume 55, no 1. 2016
    IJAFR volume 55, no 1. 2016

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