The interaction between seeding rate and seed size of hybrid and open pollinated canola (Brassica napus) varieties on annual ryegrass (Lolium rigidum) growth and competition.

2019

Research organisatons
Funding source

Trial details

Researcher(s) Mike Ashworth
Contact email mike.ashworth@uwa.edu.au
Year(s) 2019
Contributor School of Agriculture and Environment - The University of Western Australia
Trial location(s) Kojonup, WA
Miling, WA
The interaction between seeding rate and seed size of hybrid and open pollinated canola (Brassica napus) varieties on annual ryegrass (Lolium rigidum) growth and competition. locations
Aims

Trials located at Miling and Kojonup in the grainbelt of Western Australia investigated combinations of canola variety (hybrid or open pollinated), canola seeding rate (20, 35 or 50 plants/m2) and canola seed size (<1.8, >2.0mm diameter) on ARG management.

Key messages

Annual ryegrass (ARG) establishment was reduced in hybrid canola treatments, treatments with increased seed size and higher seeding rates. However, no interaction between these factors existed. At the Kojonup site, ARG seed production was reduced by hybrid varieties (Trophy). Due to the low rainfall at the Miling site, no interaction between treatments were identified. Canola yield in this study was increased in the hybrid variety (Trophy) treatments especially at higher seeding rates (50 plants/m2). In the absence of ryegrass, increased canola seed size also increased canola yield. This study conducted two trials in 2018 (Mingenew and Cunderdin) and 2019 (Miling and Kojonup). Multi- environment trial analysis for the combined 2018 and 2019 data to be completed.

Lead research organisation Australian Herbicide Resistance Initiative
Host research organisation N/A
Trial funding source GRDC 9175134
Related program N/A
Acknowledgments N/A
Other trial partners Living Farm
Download the trial report to view additional trial information

Method

Crop types Weed: Ryegrass Oilseed: Canola
Treatment type(s)
  • Crop: Variety
  • Sowing: Method
  • Sowing: Rate
Trial type
Trial design

Kojonup 2019 Ryegrass

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Kojonup 2019 Canola

Sow date 5 May 2019
Harvest date Unknown
Plot size Not specified
Plot replication Not specified

Miling 2019 Canola

Sow date Not specified
Harvest date Not specified
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
Kojonup, WA Not specified
Miling, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Kojonup, WA Sodosol
Miling, WA Kandosol
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 Kojonup WA Miling WA
2019 241.6mm181.5mm
2018 261.7mm206.8mm
2017 279.3mm202.2mm
2016 297.3mm232.8mm
2015 249.0mm212.3mm
2014 258.4mm160.4mm
2013 271.2mm197.5mm
2012 280.2mm234.7mm
2011 290.3mm225.6mm
2010 225.1mm204.7mm
2009 275.4mm213.4mm
2008 274.3mm225.9mm
2007 262.5mm224.4mm
2006 239.9mm232.9mm
2005 272.9mm197.3mm
2004 257.1mm195.9mm
2003 252.5mm197.2mm
2002 222.4mm157.0mm
2001 185.1mm150.7mm
2000 258.8mm233.8mm
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.

Kojonup WA

Miling WA

Kojonup WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Miling WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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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

2019 trial report



Trial last modified: 20-03-2023 15:15pm AEST