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Climate change mitigation and adaptation: R&D for the future grains industry

Climate change mitigation and adaptation: R&D for the future grains industry. Ash Wallace, DEPI Horsham. Mitigating N 2 O emissions. Why N 2 O? Greenhouse impact & nitrogen is an important input

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Climate change mitigation and adaptation: R&D for the future grains industry

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  1. Climate change mitigation and adaptation: R&D for the future grains industry Ash Wallace, DEPI Horsham

  2. Mitigating N2O emissions • Why N2O? Greenhouse impact & nitrogen is an important input • Researching & communicating mitigation options for N2O loss from broadacre cropping – altered fertiliser rates, timing, products • N2O monitored using static chambers • Looking for ways the minimise emissions and improve productivity

  3. Where are we working? n2o.net.au

  4. What are we finding? Taylors Lake (medium rainfall) 2013 raw data

  5. What are we finding? Tarrington (HRZ) 2012/13 raw data

  6. What does this actually mean? • N2O: the tap is dripping in terms of productivity • Mitigation options are still being verified • Currently little incentive to manage • Communicating this work is difficult • A risk management approach

  7. Future wheat varieties: AGFACE • Elevated atmospheric CO2 around growing crops to measure • Yield • Grain quality • Nitrogen use • Pests and diseases Interactions with variety

  8. CO2 response depends on variety • CO2 acts as a fertiliser for crop growth and yield, but • The response depends on variety, season and other limiting factors e.g. water

  9. CO2 response depends on variety • CO2 acts as a fertiliser for crop growth and yield, but • The response depends on variety, season and other limiting factors e.g. water

  10. CO2 response depends on variety • CO2 acts as a fertiliser for crop growth and yield, but • The response depends on variety, season and other limiting factors e.g. water

  11. Grain Quality - Protein • Decreased protein in cereals – not pulses • Higher yields with same N supply • Possibly also changing N use efficiency • Numbers change from year to year (reductions of up to 8%)

  12. Modelling the climate effect eCO2 = yield increases eCO2 + increased temperature + reduced rainfall = yield increases and decreases IPCC A1Fi scenario, CSIRO CCAM Mark 3, present-day long-season cv.

  13. Next steps

  14. Thankyou Farmer collaborators and colleagues who make it happen

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