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Can the seeding rate of canola be reduced in the HRZ? Condingup 2022

2022

Research organisation
Funding source
Department of Primary Industries and Regional Development WA
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Jeremy Curry
Mark Seymour
Contact email jeremy.curry@dpird.wa.gov.au
Contact phone 0890831160
Year(s) 2022
Contributor Department of Primary Industries and Regional Development WA
Trial location(s) Howick, Western Australia, WA
Can the seeding rate of canola be reduced in the HRZ? Condingup 2022 locations
Aims

To investigate whether yield can be maintained as seeding rate (plant density) of canola is reduced in the high rainfall zone.

Key messages
  • Average establishment was 5, 8, 16 and 36 plants m-2 from seeding rates of 0.5, 0.9, 1.8 and 3.7 kg/ha.
  • Differences in canopy cover (assessed by NDVI) persisted through to the start of flowering.
  • The yield of the lowest seeding rate (2.8 t/ha) was significantly lower than the other seeding rates (3.4-3.6t/ha, not statistically different).
  • Quadrat cuts indicated that yield reductions at low plant densities (e.g. 5 plants m-2) were likely the result of bare areas rather than the inability of canola to compensate where 5 plants m-2 were established.
  • Although plant stands of as low as 8 plants m-2 maintained yield relative to higher seeding rates, suboptimal or variable establishment that results in bare areas is likely to significantly reduce yield and so aiming for at least 20 plants m-2 is recommended.
Lead research organisation Department of Primary Industries and Regional Development WA
Host research organisation N/A
Trial funding source GRDC DAW1903-008RMX
Related program N/A
Acknowledgments

This experiment has been conducted through the Optimising high rainfall zone cropping for profit in the Western and Southern Regions project, funded by GRDC and run through collaboration by DPIRD, CSIRO and FAR Australia. DPIRD gratefully acknowledge Andrew Fowler for generously providing the trial site, and his staff at Chilwell, particularly Clint Simpson and Deode Wilson for their assistance during the season. Thanks to Chris Matthews and the Esperance RSU for trial management and Helen Cooper for her technical assistance.
Other trial partners FAR Australia, CSIRO
Download the trial report to view additional trial information

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Sowing : Rate
Trial type Experimental
Trial design Randomised

Howick, Western Australia 2022

Sow rate or Target density 5, 10, 20 and 40 plants m2
Sow date 26 April 2022
Harvest date 15 November 2022
Plot size 2m x 12m
Plot replication 6
Fertiliser

26-April – 200kg/ha Summit Vigour Rich (10% N-14% P-10% K-5% S)

25-May – 100kg/ha Sulphate of ammonia (21% N-24% S) plus 259 kg/ha urea (46% N).

24-June – 87kg/ha urea (46% N). 27-June - 1kg/ha CuSO4 + 1kg/ha ZnSO4 + 4kg/ha MnSO4
Herbicide

IBS – 1.5 L/ha SpraySeed (135g/L paraquat + 115g/L diquat) + 2 L/ha TriflurX (480g/L trifluralin)
Post-em – 3-Jun 0.9kg/ha Roundup Ready Herbicide with PLANTSHIELD (690g/kg glyphosate)

16-June – 0.9kg/ha Roundup Ready Herbicide with PLANTSHIELD (690g/kg glyphosate)
Desiccation - 03-November – 3L/ha Reglone (200g/L diquat) + 0.16% BS1000
Insecticide

PSPE – 1L/ha Pyrinex Super (400g/L chlorpyrifos + 20g/L bifentrhin)

12-August – 48g/ha Transform (500g/kg sulfoxaflor) + 10ml/ha Agral
Fungicide

26-April – 400ml/ha Impact (250g/L flutriafol) in-furrow

22-July – 450mL/ha Prosaro (210g/L prothioconazole + 210g/L tebuconazole)

12-August – 500mL/ha Aviator Xpro (150g/L prothioconazole + 75g/L bixafen)
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
Howick, Western Australia, WA Deep sandy duplex
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Howick, Western Australia, WA Sodosol

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.

Howick, Western Australia 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

2022 trial report



Trial last modified: 02-12-2024 12:07pm AEST