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

2012

Research organisaton
Funding source

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

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.