| Researcher(s) |
Nick Poole Darcy Warren |
|---|---|
| Year(s) | 2020 |
| Contributor | Field Applied Research (FAR) Australia |
| Trial location(s) |
Millicent, SA
|
To assess the performance of winter and spring wheat varieties managed under three different levels of management sown in mid-April (17th April).
• The awnless feed wheat SFR86-090 (RGT Cesario) was the top yielding variety under high input management at 9.88t/ha, however its yield was not significantly different to the winter varieties Anapurna and Tabasco.
• Unlike SFR86-090, Anapurna and Tabasco gave no significant reduction in yield when input level was reduced to standard input (120N, 2 Fungicide units, no PGR) from high (160N, 4 Fungicide units and 2 PGRs).
• Protein levels of 11 – 11.6% for most feed wheats indicated that yields were maximised at 120N with no need to go to 160N in the high N input.
• The sowing date was too early for the spring wheat germplasm (Trojan and Scepter) which developed too quickly (flowering 22-25 September) even when defoliated (simulated grazing).
• Defoliation at GS30 resulted in greater dry matter offtake with later developing cultivars, Tabasco giving over 2100kg/ha with defoliation on 25 August, compared to RGT Accroc which produced 1340kg/ha from 7 August defoliation.
• In contrast to previous seasons, there was little yield penalty for defoliation observed in the high yielding winter wheats compared to standard and high input, a possible indication that yield potential at standard and higher input was restricted.
• There were a number of factors that were the possible causes but warmer than average temperatures in November, leaf rust pressure, later army worm and low-level crown rot could have been factors.
• The dominant foliar diseases in the trial were Septoria tritici blotch (STB) with leaf rust also a significant disease. Late stripe rust was also observed in the trial, particularly in Trojan.
• In terms of yield potential, elevated temperatures in early November may have limited yield potential, but local commercial yields were higher and Tabasco with its late flowering (1st December) was still one of the highest yielding cultivars.
• With the exception of Tabasco the highest yielding cultivars flowered in the last 10 days of October, the period traditionally associated with the highest yields from this mid-April sowing date over the last three years at the SA CTC.
Rotation position: 1st Cereal after canola, 2018 wheat.
Soil type & management: Neutral-slightly alkaline Organosol (Peat soil) – high organic matter (0-30cm).
| Lead research organisation |
Field Applied Research (FAR) Australia |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC FAR2004-002SAX |
| Related program |
FAR Hyper Yielding Crops 2020-2022 |
| Acknowledgments | N/A |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow rate or Target density | 180 seeds/m2 (150 plants/m2 target) |
|---|---|
| Sow date | 17 April 2020 |
| Harvest date | 4 - 6 January 2021 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
Please see trial report for treatment details |
| Fungicide |
Please see trial report for treatment details |
| Seed treatment | Please see trial report for treatment details |
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.
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