The interaction between plant growth regulator (PGR) and nitrogen application in early-sown first wheat

2014

Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole (FAR Australia)
Michael Straight (FAR Australia)
Year(s) 2014
Contributor Riverine Plains
Trial location(s) Redlands, NSW
Yarrawonga, VIC
The interaction between plant growth regulator (PGR) and nitrogen application in early-sown first wheat locations
Aims

To examine the interaction between additional nitrogen application above grower practice and the response to plant growth regulator (PGR).

Key messages
  • In two first-wheat trials yielding 4.5-5.0t/ha, the application of a plant growth regulator (PGR) delivered no benefits in terms of yield or grain quality.
  • The PGR application did not interact with additional nitrogen applied in terms of yield or quality.
  • The impact of PGR application on crop height was greater than the impact of nitrogen timing; however, the differences in height were small.
  • The grower-applied nitrogen at Redlands, at a rate of 75kg N/ha, and at Yarrawongs at a rat eof 100kg N/ha, were shown to be optimum in terms of yield and quality, with no extra yield or protein resulting from the higher nitrogen application rates with Corack and Wedgetail.
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, Tomlinson Ag (Redlands, NSW) and Telewonga Pty Ltd (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
Trial type Experimental
Trial design Blocked

Redlands 2014

Sow date 6 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Other trial notes

GSR (Apr-Oct)

Redlands 2014

Sow date 6 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Other trial notes Not specified

Yarrawonga 2014

Sow date 20 April 2014
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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 fertiliser rate on crop growth at Coreen in 2014

# Treatment 1
Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Standard N 81.8 6.4 11.6 4.78
2 Standard + 40kg N/ha 82.2 5.4 12 4.94
3 Standard + 80kg N/ha 81.6 5 12.4 4.63

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of plant growth regular on crop growth at Coreen in 2014

# Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Untreated 81.6 5.6 12 4.82
2 Moddus + Chlormequat 82.1 5.6 12 4.74

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of fertiliser rate on crop growth at Yarrawonga in 2014

# Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Standard N 76.8 1.2 11.2 5.11
2 Standard + 40kg N/ha 74.6 2.5 12.9 5.12
3 Standard + 80kg N/ha 73.9 3.1 13.3 5.11

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Redlands, NSW Not specified
Yarrawonga, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Redlands, NSW 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 Redlands NSW Yarrawonga VIC
2014 499.9mm586.7mm
2013 496.6mm573.0mm
2012 546.9mm589.8mm
2011 556.9mm592.9mm
2010 569.8mm605.2mm
2009 508.1mm562.9mm
2008 519.7mm560.4mm
2007 538.3mm538.8mm
2006 537.5mm557.8mm
2005 536.6mm583.2mm
2004 492.0mm557.7mm
2003 492.7mm547.9mm
2002 471.1mm524.2mm
2001 517.4mm511.4mm
2000 524.8mm461.9mm
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

Redlands NSW 2014


Observed climate information

Rainfall trial gsr (mm) 382.3mm

Redlands NSW 2014


Observed climate information

Rainfall trial gsr (mm) 382.3mm

Yarrawonga VIC 2014


Observed climate information

Rainfall trial gsr (mm) 372.8mm

Derived climate information

Redlands VIC

Yarrawonga VIC

Redlands 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

2014 trial report



Trial last modified: 29-08-2019 15:31pm AEST