Strategies to reduce nitrous oxide emissions from nitrogen fertiliser applied to dryland sorghum. Part 2. Nitrous oxide emissions - Breeza

2015

Research organisaton

Trial details

Researcher(s) Bruce Haigh (NSW DPI)
Graeme Schwenke (NSW DPI)
Year(s) 2015
Contributor Department of Primary Industries NSW
Trial location(s) Breeza, NSW
Strategies to reduce nitrous oxide emissions from nitrogen fertiliser applied to dryland sorghum. Part 2. Nitrous oxide emissions - Breeza locations
Aims

To report on the nitrous oxide (N2O) emission results from the 2014–15 grain sorghum trials, which aimed to optimise both nitrogen (N) rate and fertiliser N release to benefit crop production and reduce N2O emissions.

Key messages
  • Fertiliser nitrogen (N) rates tailored to suit paddock history/ soil mineral N levels optimised N2O emissions.
  • At Tamworth, withholding N fertiliser on a high mineral N soil reduced N2O emissions, but did not optimise grain yield.
  • At Breeza, most strategies of urea + nitrification inhibitor, polymer-coated urea and split N application substantially reduced N2O emissions. Most alternatives produced similar grain yields to the current practice of urea all applied at sowing, so the N2O emissions intensity per tonne of grain produced was also reduced.
  • A 1:3 blend of urea + polymer-coated urea all applied at sowing, increased N2O emissions compared with the urea all at sowing treatment. The treatment also reduced grain yield, so potential slow-release treatments need to be carefully evaluated from both an N2O emissions and grain production point of view.
Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Related program NANORP Filling the Research Gap
Acknowledgments

This research was funded by NSW DPI and the Australian Government Department of Agriculture as part of the project DAN00129: NANORP Filling the Research Gap. Many thanks to Helen Squires, Mandy Holland, and Peter Sanson for assistance with field sampling and measurements, and the Tamworth cereal agronomy team for assistance with crop agronomy. Thanks also to Incitec Pivot Fertilisers Ltd for supplying Entec®, NV®, and the polymer-coated urea (not currently a commercial product).


Other trial partners Not specified

Method

Crop type Cereal (Grain): Barley
Treatment type(s)
  • Fertiliser: Application Method
Trial type
Trial design

Breeza 2015

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Breeza 2015

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Breeza, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Breeza, NSW Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Breeza NSW
2015 397.7mm
2014 371.0mm
2013 385.9mm
2012 415.5mm
2011 414.7mm
2010 429.5mm
2009 388.5mm
2008 365.5mm
2007 359.3mm
2006 373.1mm
2005 376.3mm
2004 406.5mm
2003 402.5mm
2002 330.7mm
2001 349.6mm
2000 397.9mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Breeza NSW

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

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.

Trial report and links


No trial reports or attachments found


Trial last modified: 23-09-2019 13:59pm AEST