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Nitrogen management of hybrid and open-pollinated canola in the WA low rainfall mallee

2012

Research organisaton
Funding source
Department of Agriculture and Food WA
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Mark Seymour (DAFWA)
Year(s) 2012
Contributor Department of Agriculture and Food WA
Trial location(s) Grass Patch, WA
Nitrogen management of hybrid and open-pollinated canola in the WA low rainfall mallee locations
Aims

To investigate the nitrogen rate and time of application response of canola varieties to yield and oil content of TT and RR hybrids in comparison with open-pollinated types to: 1. Provide growers in lower rainfall environments with guidelines on optimal nitrogen rates and times of application to maximise grain and oil yields. 2. Determine if the management of hybrid canola nutrition is different to that of open pollinated varieties due to different responses to N rates and timing.

Key messages

In a dry year hybrid RR canola with no applied nitrogen produced the best returns to growers. RR hybrids had higher oil and applying N reduced oil more than it increase yield. With TT technology CB Telfer the most popular variety in the low rainfall area produced the best combination of oil and yield. Hybrid TT was not superior to OP TT’s at Grass Patch in 2012. Late applications of N produced similar yield responses to earlier N applications.

Lead research organisation Department of Agriculture and Food WA
Host research organisation N/A
Trial funding source GRDC SDI00004
Related program Regional Cropping Solutions Network
Acknowledgments

Thanks to the Sanderson family for hosting the trial.
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Crop: Variety
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Grass Patch 2012

Sow rate or Target density Target density of 30 plants/m²
Sowing machinery

Coneseeder with knife points and press wheels, capacity to deep band of topdress fertiliser in one pass whilst sowing seed as per treatment requirements
Sow date 30 April 2012
Harvest date 29 October 2012
Plot size 20m x 1.44m
Plot replication 3
Paddock history 2011 barley, 2010 wheat, 2009 wheat, 2008 field pea
Fertiliser

As per treatments: 0kg N/ha, 25kg N/ha, 50kg N/ha, 75kg N/ha, 100kg N/ha applied in split applications plus 100kg N/ha applied either at seeding, 4 weeks after sowing (WAS, @ 2-4 leaf)), 8WAS (@ 6 leaf) and 12 WAS (near bud at top of canopy).
Tillage knife points
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Variety
 Treatment 1
Treatment 2
Oil (%) Percentage of site mean (%) Grain yield (t/ha) Site gross margin mean (%) Gross margin ($/ha)
1 █ CB Tanami █ 0 kg N/ha █ 0N 41.1 73 0.61 90 210
2 █ CB Tanami █ 25 kg N/ha █ 25N 0N 0N 37.9 83 0.7 91 212
3 █ CB Tanami █ 50 kg N/ha █ 0N 50N 0N 38.2 86 0.72 76 179
4 █ CB Tanami █ 50 kg N/ha █ 25N 25N 0N 37.9 92 0.77 87 204
5 █ CB Tanami █ 75 kg N/ha █ 25N 50N 0N 36.8 93 0.79 75 175
6 █ CB Tanami █ 100 kg N/ha █ 25N 50N 25N 37.5 113 0.95 96 225
7 █ Cb Junee Ht █ 0 kg N/ha █ 0N 43 86 0.72 109 255
8 █ Cb Junee Ht █ 25 kg N/ha █ 25N 0N 0N 39.8 92 0.78 102 238
9 █ Cb Junee Ht █ 50 kg N/ha █ 0N 50N 0N 39.2 97 0.82 89 209
10 █ Cb Junee Ht █ 50 kg N/ha █ 25N 25N 0N 39.8 99 0.84 95 223
11 █ Cb Junee Ht █ 75 kg N/ha █ 25N 50N 0N 37.9 100 0.84 79 184
12 █ Cb Junee Ht █ 100 kg N/ha █ 25N 50N 25N 37.6 103 0.87 63 147
13 █ CB Telfer █ 0 kg N/ha █ 0N 45.2 78 0.65 111 260
14 █ CB Telfer █ 25 kg N/ha █ 25N 0N 0N 42.8 77 0.65 91 212
15 █ CB Telfer █ 50 kg N/ha █ 0N 50N 0N 42.7 96 0.8 110 257
16 █ CB Telfer █ 50 kg N/ha █ 25N 25N 0N 41.3 94 0.79 103 241
17 █ CB Telfer █ 75 kg N/ha █ 25N 50N 0N 41.5 103 0.87 110 257
18 █ CB Telfer █ 100 kg N/ha █ 25N 50N 25N 40.2 101 0.85 81 189
19 █ CB Telfer █ 100 kg N/ha █ 0N 100N 0N 39.4 102 0.85 87 204
20 █ CB Telfer █ 100 kg N/ha █ 0N 0N 100N 40.7 105 0.88 97 228
21 █ CB Telfer █ 100 kg N/ha █ 25N 0N 0N 75N 39.8 92 0.77 68 159
22 █ Gt Cobra █ 0 kg N/ha █ 0N 45.2 83 0.7 107 249
23 █ Gt Cobra █ 25 kg N/ha █ 25N 0N 0N 44.8 85 0.72 98 230
24 █ Gt Cobra █ 50 kg N/ha █ 0N 50N 0N 42 101 0.85 103 240
25 █ Gt Cobra █ 50 kg N/ha █ 25N 25N 0N 43 102 0.86 107 250
26 █ Gt Cobra █ 75 kg N/ha █ 25N 50N 0N 42.7 108 0.91 107 251
27 █ Gt Cobra █ 100 kg N/ha █ 25N 50N 25N 39.7 100 0.84 60 141
28 █ Hyola 404 RR █ 0 kg N/ha █ 0N 46.9 97 0.82 135 315
29 █ Hyola 404 RR █ 25 kg N/ha █ 25N 0N 0N 46.7 103 0.86 133 311
30 █ Hyola 404 RR █ 50 kg N/ha █ 0N 50N 0N 45 106 0.89 113 265
31 █ Hyola 404 RR █ 50 kg N/ha █ 25N 25N 0N 45.4 107 0.9 117 273
32 █ Hyola 404 RR █ 75 kg N/ha █ 25N 50N 0N 43.7 112 0.94 111 260
33 █ Hyola 404 RR █ 100 kg N/ha █ 25N 50N 25N 43 127 1.07 119 277
34 █ Hyola 404 RR █ 100 kg N/ha █ 25N 75N 0N 43 118 0.99 108 254
35 █ Hyola 404 RR █ 100 kg N/ha █ 25N 0N 75N 42.4 110 0.93 89 208
36 █ Hyola 404 RR █ 100 kg N/ha █ 25N 0N 0N 75N 42.6 121 1.01 112 262
37 █ 43Y23 Rr █ 0 kg N/ha █ 0N 43 90 0.76 111 260
38 █ 43Y23 Rr █ 25 kg N/ha █ 25N 0N 0N 42.7 98 0.83 114 267
39 █ 43Y23 Rr █ 50 kg N/ha █ 0N 50N 0N 40.7 102 0.85 94 219
40 █ 43Y23 Rr █ 50 kg N/ha █ 25N 25N 0N 41.6 112 0.94 118 277
41 █ 43Y23 Rr █ 75 kg N/ha █ 25N 50N 0N 39.9 123 1.04 121 284
42 █ 43Y23 Rr █ 100 kg N/ha █ 25N 50N 25N 38.9 128 1.07 105 247

Grain yield t/ha

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Gross margin $/ha

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Oil %

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Percentage of site mean %

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Site gross margin mean %

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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Grass Patch, WA 0 - 10cm Scaddan loam 6.90 0.14 35.00 350.00 20.00 1.00
Soil conditions
Trial site Soil texture
Grass Patch, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Grass Patch, WA Sodosol
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 Grass Patch WA
2012 516.4mm
2011 509.1mm
2010 504.4mm
2009 512.1mm
2008 522.7mm
2007 510.2mm
2006 514.1mm
2005 506.8mm
2004 508.7mm
2003 533.2mm
2002 495.8mm
2001 515.7mm
2000 519.9mm
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

Grass Patch WA 2012

Observed climate information

Rainfall avg ann (mm) 347mm
Rainfall avg gsr (mm) 217mm
Rainfall trial total (mm) 342mm
Rainfall trial gsr (mm) 144mm

Derived climate information

Grass Patch 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

2012 trial report