HYC Spring Wheat “Reset” Trial

2020

Research organisaton
Funding source

Trial details

Researcher(s) Nick Poole
Darcy Warren
Year(s) 2020
Contributor Field Applied Research (FAR) Australia
Trial location(s) Wallendbeen, NSW
HYC Spring Wheat “Reset” Trial locations
Aims

To assess the value of pre and post GS30 defoliation in winter and spring germplasm grown in HRZ or high yielding regions of different season lengths.

Individual objectives specific to the trial were:
- Assess the dry matter offtake differences resulting from GS22, GS30 & GS32 defoliations and their effect on final harvest dry matter, grain yield and harvest index of spring versus winter wheat.
- Assess whether April sown spring wheat that has been “reset at GS32 (defoliated)” is higher yielding than GS30 and GS22 grazed and ungrazed crops.
- To assess whether the dry matter offtakes of longer season winter wheats at GS22 are more profitable (dry matter offtake and grain yield) than the same winter wheat defoliated at GS30.

Key messages

• All defoliation treatments applied post GS30 reduced grain yield relative to the ungrazed and crops grazed at GS30.
• Although shorter grazing (hard grazing) produced more dry matter and gave slightly larger reductions in grain yield than light grazing, the differences were not statistically significant.
• With later grazing dates, due to a longer vegetative period, dry matter offtakes were significantly greater with RGT Accroc than with Trojan.
• The concept of “resetting Trojan” at GS32 was unsuccessful in terms of grain yield with a 22 April sown crop in the absence of any frost events.
• The development stage of grazing and degree of grazing (hard or light) were well correlated to preventing crop lodging due to reduced crop height and in some cases significantly less harvest dry matter.
• Unless the crop was reset with defoliation post GS30 at GS32 there was little noticeable difference in flowering date, although as would be expected RGT Accroc flowered later than Trojan.

Wallendbeen NSW 2020

Rotation position: Canola 2018, Wheat 2019.
Soil type: Clay loam

Lead research organisation Field Applied Research (FAR) Australia
Host research organisation N/A
Trial funding source GRDC FAR2004-002SAX
Related program FAR Hyper Yielding Crops 2020-2022
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Crop: Variety
  • Grazing: Type
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Wallendbeen 2020

Sow rate or Target density 180 seeds/m2 (150 plants/m2 target)
Sow date 22 April 2020
Harvest date 28 November, 2020 (spring cultivars) & 14 December, 2020 (winter cultivars)
Plot size Not specified
Plot replication Not specified
Fertiliser

Please see trial report for details

Fungicide

Please see trial report for details

Seed treatment Vibrance/Gaucho
Other trial notes

The concept of “resetting” is specifically designed for early sowing spring wheat that develops too quickly from earlier sowing than would be recommended, in this case mid-late April. The idea is that defoliation later than GS31 specifically removes advanced main stems that would have been frosted due to their very early development. Please note this is an experimental approach and should not yet be applied to commercial acreage.

Download the trial report to view additional method/treatment information
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
Wallendbeen, NSW Clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Wallendbeen, NSW Kandosol
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.

Wallendbeen NSW

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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

2020 trial report



Trial last modified: 21-04-2023 12:38pm AEST