Management strategies for improved productivity and reduced nitrous oxide emissions

2014 - 2015

Research organisaton
Funding source

Trial details

Researcher(s) Sarah Noack, Peter Hooper (Hart), Nick Poole, Michael Straight, Tracey Wylie (FAR, Australia), Sam Trengove and Stuart Sherriff (Precision Agriculture Australia)
Year(s) 2014 - 2015
Contributor Hart Field Site Group
Trial location(s) Site 5, Hart, SA
Management strategies for improved productivity and reduced nitrous oxide emissions locations
Aims

To measure and demonstrate on-farm strategies that can reduce nitrous oxide by trialling four key practices:

  • Use of legumes in the cropping rotation;
  • Application of nitrogen fertiliser at key stem elongation growth stages;
  • The use of precision farming tools to better measure N mineralisation;
  • Use of nitrification inhibitors.
Key messages
  • The nitrogen application strategy that maximised grain yield was not always the same strategy to minimise nitrous oxide (N2O) emissions.
  • While nitrogen applied at GS31 maximised wheat yield following field pea it produced 10 times higher emissions compared to the same application at seeding.
  • The pattern and concentration of N2O emissions were similar for wheat following field pea or canola.
Lead research organisation Hart Field Site Group
Host research organisation Hart Field Site Group
Trial funding source Department of Agriculture AOTGR2-0015
Related program N/A
Acknowledgments

The authors acknowledge the department of Agriculture for funding this research project as part of Action on The Ground (AOTGR2-0015). We also gratefully acknowledge Rob Wandel for hosting and managing the trial on his property.

 


Other trial partners The Foundation for Arable Research Australia and Precision Agriculture Australia
Download the trial report to view additional trial information

Method

Crop types Wheat
Canola
Field peas
Treatment type(s)
  • Crop
  • Crop: Type
  • Fertiliser
Trial type
Trial design

Hart 2014 Wheat

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

Hart 2014 Canola

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

Hart 2014 Field peas

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

Hart 2015 Field peas

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

Hart 2015 Wheat

Sow date 3 May 2015
Harvest date Not specified
Plot size 9.0m x 16.5m
Plot replication 4
Fertiliser
  • Urea/DAP (22:15) @ 81 kg /ha at seeding (18 kg N/ha)
  • All in-season N applications as specified in trial report

Hart 2015 Canola

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: GS32 @T2: GS39 @T3: GS65 @T4: GS99
# Treatment 1
Treatment 2
Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL) Nitrogen uptake (kg N/ha) Nitrogen uptake (kg N/ha) Nitrogen uptake (kg N/ha) Nitrogen uptake (kg N/ha)
1 Canola previous crop Nil 11.6 2.76 2.1 77.4 29 44 46 92
1 Canola previous crop 40 kg N/ha @ GS31 12.2 3.05 3.2 76.6 33 47 61 73
1 Canola previous crop 80 kg N/ha @ GS31 13.2 3.1 4.8 74.1 38 44 75 115
1 Canola previous crop 80 kg N/ha IBS 12.3 3.05 2.9 77.2 34 52 66 95
1 Canola previous crop 80 kg N/ha @ GS31 + inhibitor 13.6 3.3 5.8 74.6 37 54 84 106
2 Canola previous crop 53 kg N/ha split @ GS30, 32, 45 12.4 3.19 3.8 75.8 31 50 63 103
2 Field pea previous crop Nil 11.4 3.85 1.3 79.7 52 66 83 61
2 Field pea previous crop 40 kg N/ha @ GS31 12.1 4.31 1.8 78.7 48 73 86 67
2 Field pea previous crop 80 kg N/ha @ GS31 13 4.4 1.8 78 50 79 104 77
2 Field pea previous crop 80 kg N/ha IBS 12.4 4.15 1.4 79.5 53 80 91 66
3 Field pea previous crop 80 kg N/ha @ GS31 + inhibitor 13 4.21 1.7 78.9 51 78 94 96
3 Field pea previous crop 53 kg N/ha split @ GS30, 32, 45 12.8 4.13 1.4 78.9 51 76 98 71
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Grain yield t/ha


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Nitrogen uptake kg N/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 5, Hart, SA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 5, Hart, SA Chromosol
National soil grid Source
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.

Site 5, Hart SA

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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 last modified: 06-08-2019 07:54am AEST