The Australian Nitrous Oxide Research Program - Peter Grace, QUT
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The Australian Nitrous Oxide Research Program - Peter Grace, QUT
- 1. The Australian Nitrous Oxide Research Program (NORP) Peter Grace n2o.net.au N 2 O Network
- 4. Why N 2 O? NH 4 + NO 3 + N 2 O N 2 N 2 O Nitrification Denitrification Fertiliser etc
- 5. Why N 2 O? NH 4 + NO 3 + N 2 O N 2 N 2 O Nitrification Denitrification Soil water content < Field capacity Saturated
- 6. Why N 2 O? NH 4 + NO 3 + N 2 O N 2 N 2 O Nitrification Denitrification LABILE CARBON Soil water content < Field capacity Saturated
- 7. Why N 2 O? NH 4 + NO 3 + N 2 O N 2 N 2 O Nitrification Denitrification N 2 /N 2 O = 30+ Soil water content < Field capacity Saturated
- 9. NORP Core Field Sites Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe
- 15. NORP Core Field Sites Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe Rainfed grains Rainfed grains Rainfed grains
- 19. NORP Core Field Sites Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe Rainfed grains Rainfed grains Irrigated grains/cotton Rainfed grains/sugar cane Rainfed grains
- 21. NORP Core Field Sites Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe Rainfed grains Rainfed grains Irrigated grains/cotton Rainfed grains/sugar cane Rainfed grains Dairy
- 23. NORP Core Field Sites Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe Rainfed grains Rainfed grains Rainfed grains/sugar cane Rainfed grains
- 25. NORP Core Field Sites + Wongan Hills Terang Hamilton Tamworth` Mackay Kingsthorpe Narrabri Griffith Wollongbar
- 26. Daily N 2 O flux (+/- inhibitor) - dairy Terang (Vic) Kelly et al. unpublished
- 27. Hourly N 2 O flux – wheat Wongan Hills (WA) Barton et al. unpublished
- 39. Labile carbon and N 2 O emissions in cropping systems
- 40. Labile carbon and N 2 O emissions in cropping systems
- 41. Labile carbon and N 2 O emissions in cropping systems
- 42. Nitrogen Use Efficiency (Cereals)* *FAOSTAT
- 43. Regional N 2 O Emission Potential Low Medium High No data/uncertain Grace et al. unpublished
- 46. Irrigation management – wheat Kingsthorpe (Qld) Treatment Irrigated Optimum Dryland Average Flux (g N 2 O-N/ha/day) 5.5 3.2 3.3 Seasonal Flux (kg N 2 O-N/ha) 0.75 0.43 0.45 Emissions factor (%) 0.38 0.22 0.23 Irrigation/rain (mm) 417 315 219 Yield (t/ha) 3.1 1.9 1.6 Emissions intensity (kg N 2 O-N/t yield) 0.25 0.27 0.33
- 47. Irrigation management – wheat Kingsthorpe (Qld) Treatment Irrigated Optimum Dryland Average Flux (g N 2 O-N/ha/day) 5.5 3.2 3.3 Seasonal Flux (kg N 2 O-N/ha) 0.75 0.43 0.45 Emissions factor (%) 0.38 0.22 0.23 Irrigation/rain (mm) 417 315 219 Yield (t/ha) 3.1 1.9 1.6 Emissions intensity (kg N 2 O-N/t yield) 0.25 0.27 0.33
- 48. Irrigation management – wheat Kingsthorpe (Qld) Treatment Irrigated Optimum Dryland Average Flux (g N 2 O-N/ha/day) 5.5 3.2 3.3 Seasonal Flux (kg N 2 O-N/ha) 0.75 0.43 0.45 Emissions factor (%) 0.38 0.22 0.23 Irrigation/rain (mm) 417 315 219 Yield (t/ha) 3.1 1.9 1.6 Emissions intensity (kg N 2 O-N/t yield) 0.25 0.27 0.33
- 50. THANK YOU
Notas del editor
- This is the first two experiments (same treatments), but conducted on fresh area of pasture
- N use efficiency is important where labile C is available, and in practice NUE has remained static in Australia.