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 and Michael Straight (FAR Australia)
Year(s) 2014
Contributor Riverine Plains
Trial location(s) Redlands, NSW
Site 3, 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 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

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

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

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

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

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

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

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

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
Site 3, Yarrawonga, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Redlands, NSW Sodosol
Site 3, Yarrawonga, VIC Sodosol
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

Redlands NSW 2014


Observed climate information

Rainfall trial gsr (mm) 382.3mm

Redlands NSW 2014


Observed climate information

Rainfall trial gsr (mm) 382.3mm

Site 3, Yarrawonga VIC 2014


Observed climate information

Rainfall trial gsr (mm) 372.8mm

Derived climate information

Redlands VIC

Site 3, Yarrawonga VIC

Redlands VIC

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Site 3, 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 last modified: 29-08-2019 15:31pm AEST