HYC PGR x harvest date interaction

2021

Research organisaton
Funding source

Trial details

Researcher(s) Nick Poole
Darcy Warren
Year(s) 2021
Contributor Field Applied Research (FAR) Australia
Trial location(s) Millicent, SA
HYC PGR x harvest date interaction locations
Aims

To assess the value of PGRs with delayed harvest in HRZ regions on maintaining yield and reducing head loss, brackling and lodging.

Key messages

Planet harvested on time yielded 4.79t/ha and 1t less at 3.75 when harvest was delayed by 21 days.

Pixel yielded 9.25t/ha when harvested on time, and 2t less when harvest was delayed by 21 days at 7.37t/ha.

PGRs had a significant impact on plant architecture, however there was minimal lodging in this experiment.

PGR yield responses were variable but never yielded lower than untreated when harvest was delayed.

This highlights the differences in yield loss to head loss and shattering in different cultivars and suggests harvest logistics are likely to be more effective than PGRs in managing yield losses.

A single application of a PGR Moddus @GS31 did not reduce height in Pixel and Planet despite significantly reducing the first internode height demonstrating some evidence of bounce back.

A two-spray approach of a PGR Moddus @GS31 and Moddus @GS39 significantly reduced height from 108cm to 99cm in Pixel, and from 85cm to 80cm in Planet.

A two-spray approach of a PGR Moddus @GS31 and Ethephon @GS39 significantly reduced height similar to the Moddus combination.

Peduncle length was shortened from 25.6 to 21.8cm in Pixel, and from 21.4 to 16.7cm in Planet when the second application of a Moddus PGR was applied at GS39, the ethephon PGR reduced peduncle length to a greater degree down to 19.8cm in pixel, and 11.9cm in Planet.

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
  • Growth regulator: Type
  • Harvest: Timing
  • Management systems: Canopy Management
Trial type Experimental
Trial design Replicated

Millicent 2021

Sow date 21 April 2021
Harvest date Time 1: 14/12/2021; Delayed harvest time 2: 4/01/2022
Plot size Not specified
Plot replication Not specified
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
Millicent, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Millicent, SA Organosol
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.

Millicent SA

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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

2021 trial report



Trial last modified: 10-03-2023 12:56pm AEST