Contribution of leaves to the yield of sunflowers - Gurley

2015 - 2016

Research organisaton
Funding sources

Trial details

Researcher(s) Loretta Serafin, Mark Hellyer and Peter Perfrement (NSW DPI)
Year(s) 2015 - 2016
Contributor Department of Primary Industries NSW
Trial location(s) Site 3, Gurley, NSW
Further information View external link
Related trials
Contribution of leaves to the yield of sunflowers - Gurley locations
Aims

To quantify the contribution of different sunflower leaves to yield and oil quality through applying 12 leaf defoliation treatments.

Key messages
  • Sunflower yields were very low at this site in 2015–16, averaging 0.24 t/ha, and overall variability was very high.
  • The total removal of leaves at the budding stage had the largest impact on plant structures; plant height, head diameter and arc length.
Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Trial funding source GRDC DAN00197
Trial funding source DPI NSW DAN00197
Related program Tactical agronomy for selected crops in the northern region (safflower, linseed, sunflower)
Acknowledgments

This experiment was part of the project Tactical agronomy for selected crops in the northern region (safflower, linseed, sunflower) (DAN00197), with joint investment by NSW DPI and GRDC. Thanks to Nuseed and Neil Weier for supplying experiment seed. Technical assistance provided by Delphi Ramsden, Angus Hombsch, Alice Bowler and Bronwyn Brennan (NSW DPI) is gratefully acknowledged. Thanks to Doug Clark, ‘Kyntyre’, Gurley for hosting the experiment.


Other trial partners Doug Clark (co-operator): ‘Kyntyre’, Gurley
Download the trial report to view additional trial information

Method

Crop type Sunflower
Treatment type(s)
  • Crop
Trial type Experimental
Trial design Replicated

Gurley 2015

Sow date 9 September 2015
Harvest date 23 February 2016
Plot size Not specified
Plot replication Not specified
Fertiliser

42 kg/ha Granulock Z applied at sowing

Gurley 2016

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Affect from defoliation treatments on sunflower plant structures

# Treatment 1
Plant height (cm) Head arc length (cm) Head diameter (cm)
1 Control - no leaves removed (0/3) 129.5 13 12.1
2 Budding - remove all leaves (3/3) 66.4 2.5 1.5
3 Budding - remove top 10 leaves (1/3) 123.6 13.6 11.3
4 Budding - remove top 20 leaves (2/3) 113.9 10.5 7.9
5 Budding - remove bottom 10 leaves (1/3) 126.9 11.7 10.2
6 Start of flowering - remove top 10 leaves (1/3) 122.5 12 9.1
7 Start of flowering - remove top 20 leaves (2/3) 126.1 13.5 10.5
8 Start of flowering - remove all leaves (3/3) 121.4 16.1 7.5
9 Start of flowering - remove bottom 10 leaves (1/3) 121 12.5 9.7
10 Flowering complete - remove top 10 leaves (1/3) 126.7 13.2 9.9
11 Flowering complete - remove top 20 leaves (2/3) 121.9 13.2 10
12 Flowering complete - remove all leaves (3/3) 123.8 13.9 9.3

Head arc length cm


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Head diameter cm


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Plant height cm


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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Site 3, Gurley, NSW 0 - 10cm 6.10 16.00 0.49
Site 3, Gurley, NSW 10 - 30cm 7.00 4.00 0.43
Site 3, Gurley, NSW 30 - 60cm 7.80 2.00 0.34
Site 3, Gurley, NSW 60 - 90cm 7.90 0.00 0.28
Site 3, Gurley, NSW 90 - 120cm 8.00 3.00 0.12
Soil conditions
Trial site Soil texture
Site 3, Gurley, NSW Vertisol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 3, Gurley, NSW Vertosol
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 Site 3, Gurley NSW
2016 182.4mm
2015 166.4mm
2014 162.2mm
2013 168.4mm
2012 202.5mm
2011 213.1mm
2010 222.1mm
2009 206.0mm
2008 207.6mm
2007 217.3mm
2006 217.8mm
2005 244.9mm
2004 281.1mm
2003 285.1mm
2002 294.3mm
2001 382.3mm
2000 506.8mm
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

Site 3, Gurley NSW 2015


Observed climate information

Rainfall avg ann (mm) 603mm
Rainfall trial gsr (mm) 286mm

Derived climate information

Site 3, Gurley NSW

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

2015 trial report



Trial last modified: 06-08-2019 07:54am AEST