Monitoring the response of nitrogen application to wheat under full stubble retention

2014

Research organisatons
Funding source

Trial details

Researcher(s) Peter Hooper (Hart Field-Site Group)
Sarah Noack (Riverine Plains)
Nick Poole (FAR Australia)
Cassandra Schefe (Riverine Plains)
Michael Straight (FAR Australia)
Sam Trengove (SPAA)
Tracey Wylie (FAR Australia)
Year(s) 2014
Contributor Riverine Plains
Trial location(s) Dookie, VIC
Yarrawonga, VIC
Monitoring the response of nitrogen application to wheat under full stubble retention locations
Aims

To monitor the response of nitrogen application to wheat under full stubble retention.

Key messages
  • Two first-wheat trials sown early-mid May showed significant increases in yield where nitrogen was applied. However, the timing of nitrogen application or whether the nitrogen was applied as a single or split application, gave no difference in yield.
  • Normalised difference vegetation index (NDVI) assessments showed no difference in crop reflectance (crop canopy greeness) due to timing of nitrogen application. However, there were NDVI differences due to the rates of nitrogen applied at the key growth stages (GS31 and GS33) where additonal nitrogen could still be applied to the crop to assist in reaching yield potential.
  • Nitrogen timing had no effect on tiller and head numbers; however, a split application produced a taller crop canopy.
  • Higher rates of nitrogen produced more dry matter (DM) and increased plant uptake of nitrogen, but the timing of application did not affect DM and nitrogen uptake.
Lead research organisation Commonwealth Scientific and Industrial Research Organisation
Host research organisation N/A
Trial funding source GRDC
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

Thanks to the farmer co-operators, Mark Harmer (Dookie, Vic) and the Inchbold family (Yarrawonga, Vic).


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Dookie 2014

Sow date 15 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication 4
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Other trial notes

GSR (Apr-Oct)

Yarrawonga 2014

Sow date 8 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication 4
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Other trial notes Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Effect of nitrogen rate on grain parameters at Yarrawonga 2014

# Treatment 1
Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL)
1 0kg N/ha 9.5 5.02 6.9 80.4
2 60kg N/ha 10.5 5.48 6.5 80.2
3 120kg N/ha 11.5 5.77 5.5 79.8

Grain yield t/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Trial results Effect of nitrogen rate on grain parameters at Dookie 2014

# Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL)
1 0kg N/ha 7.1 4.83 2.7 81.8
2 60kg N/ha 8.2 5.97 2.1 81.7
3 120kg N/ha 9.8 6.17 1.9 79.7

Grain yield t/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
Dookie, VIC Not specified
Yarrawonga, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Dookie, VIC Sodosol
Yarrawonga, VIC 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 Dookie VIC Yarrawonga VIC
2014 168.0mm586.7mm
2013 169.5mm573.0mm
2012 202.6mm589.8mm
2011 236.0mm592.9mm
2010 251.3mm605.2mm
2009 194.9mm562.9mm
2008 248.4mm560.4mm
2007 238.2mm538.8mm
2006 267.3mm557.8mm
2005 304.7mm583.2mm
2004 298.6mm557.7mm
2003 350.4mm547.9mm
2002 334.5mm524.2mm
2001 388.8mm511.4mm
2000 413.1mm461.9mm
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

Dookie VIC 2014


Observed climate information

Rainfall trial gsr (mm) 386mm

Yarrawonga VIC 2014


Observed climate information

Rainfall trial gsr (mm) 372.8mm

Derived climate information

Dookie VIC

Yarrawonga VIC

Dookie VIC

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Yarrawonga VIC

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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

2014 trial report



Trial last modified: 28-11-2019 11:27am AEST