HYC PGR x harvest date interaction

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) Gnarwarre, VIC
HYC PGR x harvest date interaction locations
Aims

To assess the value of PGRs with delayed harvest in HRZ regions.

Key messages

 RGT Planet achieved a grain yield of 8.3 t/ha significantly higher than the winter cultivar Cassiopee at 8.0 t/ha when harvested on time.
 Untreated (without PGR) and harvested on time achieved an average yield of 7.89t/ha and delaying harvest by three weeks yielded 0.47t/ha less at 7.42t/ha due to headloss. PGR’s increased yield on average irrespective of harvest date and enable growers more time to manage harvest logistics with limited downside risk. The two-spray strategy of a PGR at G31 followed by a second application at GS37 – 49 yielded significantly higher at 8.32t/ha when harvested on time, and did not suffer a yield penalty when harvest three weeks later.
 Irrespective of harvest date the PGR had the largest effect in Cassiopee and the use of a single PGR at GS31 increased yield by 0.5t/ha compared to untreated. This application benefit was primarily due to reducing lodging, the addition of a second application at GS37 did not further increase yield, however when the GS31 application was combined with a later application at GS49 yield increased 1.45t/ha due to the added head loss control.
 There wasn’t any significant yield difference across all treatments in RGT Planet relative to the untreated control. While there was consistently 5 – 10 heads/m2 on the ground from delaying harvest in RGT Planet, these were not enough to influence yield.
 The pressure on head loss was less at this site in 2020 compared to other hyper yielding centers highlights under moderate head loss pressure RGT planet is unlikely to benefit from PGR applications while winter cultivars will require them.
 These results require further validation in 2021 but have demonstrated there is little downside risk with the use of PGRs in the higher rainfall zone. This works well for farm logistics and the timings of a PGR application at GS31 and later application could also be combined with the most effective fungicide timings.

Gnarwarre VIC 2020

Rotation position: 1st cereal following canola
Soil Type: Grey 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): Barley
Treatment type(s)
  • Crop: Variety
  • Growth regulator: Timing
  • Harvest: Timing
  • Management systems: Canopy Management
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Gnarwarre 2020

Sow rate or Target density 200 seeds/m2
Sow date 25 April 2020
Harvest date 14-15 December, 2020
Plot size Not specified
Plot replication Not specified
Fertiliser

Sowing Fertiliser: 100kg/ha MAP

Nitrogen: 23 June - 69 N kg/ha
                 7 August - 69 N kg/ha

Fungicide

17 August : Prosaro 300ml/ha
29 September : Radial 840ml/ha
28 October : Prosaro 300ml/ha

Seed treatment Vibrance & Gaucho
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
Gnarwarre, VIC Grey clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Gnarwarre, VIC Sodosol
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.

Gnarwarre 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

2020 trial report



Trial last modified: 19-04-2023 10:55am AEST