| Researcher(s) |
Nick Poole Darcy Warren |
|---|---|
| Year(s) | 2021 |
| Contributor | Field Applied Research (FAR) Australia |
| Trial location(s) |
Millicent, SA
|
To assess the value of pre and post GS30 defoliation in spring germplasm grown in HRZ regions of different season lengths using 21st April sowing date.
ï‚· There were no significant differences in grain yield as result of grazing Trojan at GS30 but yield was reduced when grazing was delayed to GS32 (second node).
ï‚· There was evidence of frost in the ungrazed plots indicating that the slightly earlier flowering period in the ungrazed was not disadvantaged which can often be the case when spring wheat is sown in mid-late April.
ï‚· The delayed grazing strategy (GS32) resulted in lower grain yield and higher screenings, however there was an increase in grain protein content.
ï‚· Grazing late at GS32 resulted in an increase in grain protein and correlates to the lower yield in this treatment.
Rotation position: 1st cereal after faba bean, 2019 canola.
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 date | 21 April 2021 |
|---|---|
| Harvest date | 11 - 13 January 2022 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Other trial notes |
Caution: Please note aspects of carrying out defoliation post GS30 is purely experimental since it may reduce grain yield. |
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.
