| Researcher(s) |
Nick Poole Darcy Warren |
|---|---|
| Year(s) | 2021 |
| Contributor | Field Applied Research (FAR) Australia |
| Trial location(s) |
Wallendbeen, NSW
|
To assess the performance of winter and spring wheat germplasm managed under three different levels of management (20th April sown).
Winter feed wheats RGT Cesario, RGT Accroc and Anapurna were significantly higher yielding than all other cultivars tested giving yields over 11t/ha and a 3t/ha plus advantage over Scepter.
The ASW wheat DS Bennett was significantly higher yielding than all other white wheat milling varieties exceeding 10t/ha but required higher input to achieve these yields.
There was a significant (p=<0.001) interaction between management level and cultivar, indicating that influence of management was different when applied to the germplasm tested in this environment.
Of the spring wheats Catapult and Scepter were the highest yielding when the mean of the three managements were considered.
There was a significant reduction in yield as a result of defoliation (simulated grazing) at GS30 when the results from all cultivars were averaged, however the reduction was not apparent in DS Bennett, Scepter and Trojan. The reduction was greatest with latest
developing cultivar RGT Cesario (1.2t/ha).
Although yield was unaffected by defoliation, Trojan and Scepter suffered a down grade in bin grade due to lowered grain protein, indicating that higher N input was required to replace N removed in the defoliation.
All cultivars gave a yield response to high input management with a range 0.42 - 1.78t/ha, DS Bennett being the most responsive to higher input and RGT Cesario being the least responsive.
Dry matter (DM) contents at harvest ranged from 16 – 24t/ha with significantly higher DM accumulation in the longer season winter wheats such as RGT Accroc, Anapurna and RGT Cesario compared to Scepter.
Greater dry matter accumulation with the winter wheat up to GS30 was the result of a longer vegetative period that correlated to higher tiller number per unit area and tillers/plant.
In general, disease (principally Septoria and stripe rust) has been controlled by the two-spray program set out in standard management approach, however those varieties that tended to give higher yields at higher input were in general the more susceptible cultivars.
In those cultivars that lodged (Catapult, DS Bennett, Scepter and Trojan), both PGR and grazing reduced plot lodging compared to standard management without PGR.
DS Bennett was most profitable across all management input levels. Spring wheats were most profitable under the high input management.
The application of PGR’s significantly reduced crop height in all cultivars. DS Bennett was the only cultivar where grazing had a bigger effect on crop height than PGR’s.
Protein levels averaged just 12% and indicated that yields were optimised at the level of N application. Grazing significantly reduced grain protein by 0.8% on average.
Harvest indices for the higher yielding winter wheats were in general around 41% compared to spring wheats that averaged around 35%.
Sown: 20 April 2021
Harvested: 5 January 2022
Rotation position: 1st Cereal after canola 2020
Soil type and management: Red clay loam – Kelly chained over summer
| 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 | 20 April 2021 |
| Harvest date | 5 January 2022 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Fertiliser |
Please see report for treatment details |
| Fungicide |
Please see report for treatment details |
| Seed treatment | Please see 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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