Brian Dzoma (SARDI)
Roy Latta (SARDI)
|Contributor||Eyre Peninsula Agricultural Research Foundation|
Agricultural soils are the main source of emission of the greenhouse gas (GHG) nitrous oxide (N2O) to the atmosphere. N2O is a potent GHG which lasts in the atmosphere for 114 years and has a global warming potential of approximately 300 times greater than that of carbon dioxide over a 100 year timescale. Agriculture accounts for 16% of Australia’s greenhouse gas emissions but produces 80% of Australia’s N2O emissions. This project seeks to measure and quantify N2O emissions from wheat grown in rotation with canola, pulses and legume pastures at two sites in low and medium/high rainfall farming systems of the Eyre Peninsula, while assessing best management practices that local farmers can adopt to reduce the risk of N2O losses and ultimately improve the paddock’s crop productivity and gross margin.
• Work conducted in low and medium rainfall environments indicate that N2O emissions are low from an overall national perspective. • Results showed that there was no clear response of N2O emissions to nitrogen applied at sowing and post sowing. • High pre-seeding soil mineral nitrogen raises the possibility of higher N2O losses over the fallow period following significant rainfall.
|Lead research organisation||N/A|
|Host research organisation||
SARDI Minnipa Agricultural Centre
|Trial funding source||DAWR AOTGR1- 035|
Carbon Farming Initiative
Minnipa Agricultural Centre and David Giddings for the use of their land. Terry Blacker and Ian Richter for their technical support. This project is supported by funding from the Australian Government Department of Agriculture, - Action on the Ground program.
|Other trial partners||Not specified|
|Sow date||11 May 2014|
|Harvest date||25 November 2014|
|Plot size||10m x 3m|
18:20:00:0 @ 80kg/ha
||Protein (%)||Grain yield (t/ha)||Cost ($/ha)||Grain N yield (kgN/ha)||Screenings (%)||Gross income ($/ha)|
|1||█ Wheat:Mace||█ Sub clover 2013||9.3||2.3||233||37.8||6.2||564|
|2||█ Wheat:Mace||█ Canola low input 2013||9.3||2.4||234||38.4||6.2||576|
|3||█ Wheat:Mace||█ Lupins 2013||9.7||2.9||245||49.6||4.4||721|
|4||█ Wheat:Mace||█ Canola high input 2013||10.3||2.7||310||48.6||5.6||657|
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.