Researcher(s) |
Sheree Blechynden (Facey Group) Brett Coxon (Summit) Sarah Hyde (Living Farm) Rebecca Jenkinson (Living Farm) |
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Year(s) | 2014 |
Contributor | Facey Group |
Trial location(s) |
Yealering, WA
|
To investigate the effect of phosphorus application rates and strategies over a number of years on the growth and yield of wheat.
The value of starter P for early crop vigour was clearly demonstrated in 2014 by the decreased growth of wheat plants when P fertiliser was omitted. This effect continued through the grain development stages and was very evident in the final grain yield differences. If P application over the previous four years averaged 12 kg/ha or less, there is a good value return from applying P. Although the highest yield was seen at 24 kg P applied in 2014, looking at historical trends shows that continual application of P at greater than 12kg/ha can provide yield gains but little or no margin and should not be considered unless low P application history, confirmed by soil P tests associated with P binding capacity, has resulted in low soil P levels. Results indicate a P recommendation of greater than 6 kg/ha to be appropriate for soils and conditions in the vicinity of the trial site, pushing up to 10-12 kg/ha if the input cost is affordable.
Lead research organisation |
Summit Fertilizers |
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Host research organisation |
Facey Group |
Trial funding source | Summit |
Related program | N/A |
Acknowledgments |
Living Farm for assistance in establishing and managing the trial. Alan Manton for continued generous support in providing the trial site. |
Other trial partners | Not specified |
Crop type | Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Randomised,Replicated |
Sow rate or Target density | 75Kg/ha |
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Sow date | 28 May 2014 28th May 2014 |
Harvest date | Not specified |
Plot size | 25m X 6.09m |
Plot replication | 3 |
Psuedoreplication | Not specified |
Fertiliser |
SOP topdressed 100 Kg/ha plus UAN 50L/ha, CU 200g/ha and Zn 200g/ha injected at seeding. UAN 60L/ha at 5 and 8 weeks after seeding (41kg/ha- K, 72kg/ha-N, 17kg/ha- S, 200kg/ha- CU, 200g/ha- ZN) |
Herbicide |
Pre-emergent: Glyphosate- 2L/ha, Avadex- 2L/ha, Sakura- 188g/ha, Diuron- 300g/ha. Post-emergent: Velocity-1L/ha, Jaguar-700mL/ha |
Fungicide |
Prosaro- 300mL/ha (post-emergent) |
@T1: 2010 | @T2: 2011 | @T3: 2012 | @T4: 2013 | @T5: Cumulative | @T6: 2014 | ||||
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# |
Treatment 1
|
Grain yield (t/ha) | Fertiliser cost ($/ha) | Grain yield (t/ha) | Grain yield (t/ha) | Grain yield (t/ha) | Grain yield (t/ha) | Gross margin ($/ha) | Gross margin ($/ha) |
1 | █ P rate 0kg/ha | 1.51 | 0 | 0.56 | 2.42 | 1.06 | 2.51 | $2,189 | 476 |
1 | █ P rate 6kg/ha | 2.27 | 20 | 0.82 | 3.21 | 1.27 | 3.11 | $2,814 | 698 |
1 | █ P rate 12kg/ha | 2.39 | 39 | 0.91 | 3.41 | 1.34 | 3.11 | $2,841 | 715 |
1 | █ P rate 18kg/ha | 2.59 | 59 | 0.91 | 3.41 | 1.43 | 3.11 | $2,775 | 630 |
1 | █ P rate 24kg/ha | 2.67 | 78 | 1.22 | 3.65 | 1.59 | 3.57 | $3,091 | 766 |
1 | █ P rate 30kg/ha | 2.48 | 98 | 1.13 | 3.65 | 1.44 | 3.44 | $2,819 | 686 |
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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.