France 2010
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France 2010

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    France 2010 France 2010 Presentation Transcript

    • A comparison of chemical fertiliser and separated liquid pig manure as the sole nitrogen source for winter wheat production.Gráinne Meade & Tom Mc CabeUniversity College Dublin,Lyons Research Farm, Newcastle, Co. Dublin, Ireland.
    • Presentation Outline
      Background
      Hypothesis
      Materials and Methods
      Results
      Conclusion
    • Background
    • Background
      Improved manure spreading technologies
      and
      Improved manure treatment technologies
      Land application of pig manure at advanced winter wheat growth stages may now be viable
    • Hypothesis
      Can liquid pig manure be used as an alternative to chemical fertiliser as a nitrogen source for winter wheat production?
    • Materials and Methods
      2 experimental sites
      3 N treatments
      Untreated zero N control
      Separated liquid pig manure (LPM)
      Inorganic N fertiliser (CF)
      3 manure application timings
      G.S 31 (1st node)
      G.S 33 (3rd node)
      G.S 39 (flag leaf emergence)
    • Materials and Methods
      N rate 120 kgN/ha
      Liquid Pig Manure (LPM)
      4% N, 0.08% P, 2% DM
      Band spread at a rate of 30 m3/ha
      Inorganic N (CF) – 27% N
      Leaf N % and chlorophyll readings taken at 10 day intervals until natural senescence
      Crop N uptake, grain yield and nitrogen uptake efficiency was assessed at harvest
    • Results
    • Effect of trial site and N source on leaf chlorophyll readings
    • Effect of trial site and N source on leaf N percent
    • Effect of manure application timing on leaf chlorophyll readings
    • Effect of N application timing on leaf chlorophyll readings
    • Polynomial regression of average leaf chlorophyll readings and leaf N content samples taken at 10 day intervals for 70 days post N application
    • Polynomial regression of average leaf chlorophyll readings and leaf N content samples taken at 10 day intervals for 70 days post N application
    • Correlation between leaf N percentage and leaf chlorophyll readings
      Chlorophyll Units
    • Effect of N source on winter wheat crop N uptake
    • Effect of N source on winter wheat grain yield (kg/ha)
    • Effect of N application timing on grain yield
    • Nitrogen uptake efficiency as affected by N source and site
    • Conclusion
      LPM proved to be a useful N source for winter wheat production
      LPM increased grain yield and CNU by 48% and 74% respectively compared to the zero N control.
      Timely LPM application can achieve similar grain yield levels to chemical fertilisers
      LPM application may result in economic benefits for cereal producers
      CF proved to be a more efficient N source for grain yield production
    • Thank you for listening!
      Any Questions????