| Researcher(s) |
Damian Jones (Irrigated Cropping Council) |
|---|---|
| Year(s) | 2016 |
| Contributor | Irrigated Cropping Council |
| Trial location(s) |
Kerang, VIC
|
To improve soil carbon through the incorporation of cereal stubbles with no impact on the subsequent canola crop.
A combination of fertiliser inputs and irrigation can rapidly breakdownincorporated cereal stubble and allow sowing 4 weeks later. Getting the balance of fertiliser, in particular N rates, to ensure rapid breakdown, but creating neither N deficiency or excessive N remains elusive.
Measuring soil organic carbon following incorporation is giving mixed results as to the ability to increase soil OC via incorporation with fertiliser
Burning the stubble gave greater yield and oil content
| Lead research organisation |
Birchip Cropping Group |
|---|---|
| Host research organisation |
Irrigated Cropping Council |
| Trial funding source | GRDC BWD00024 |
| Related program |
Maintaining profitable farming systems with retained stubble |
| Acknowledgments | N/A |
| Other trial partners | Not specified |
| Crop type | Oilseed: Canola |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow rate or Target density | 40 plants/m2 |
|---|---|
| Sowing machinery |
Spread, seed mixed with DAP |
| Sow date | 18 April 2016 Mid April |
| Harvest date | 29 November 2016 Late November |
| Plot size | 15m x 4m |
| Plot replication | 3 |
| Paddock history | Barley 2015 |
| Fertiliser |
Stubble incorporation 15/03/2016: 240 kg urea/ha 15/03/2016: 150 kg Triple Super/ha
Sowing 18/04/2016: 125 kg DAP/ha 16/06/2016: 150 or 210 kg urea/ha 29/07/2016: 130 kg urea/ha |
| Herbicide |
16/06/2016: 0.9 kg/ha Roundup Plantshield 29/07/2016: 0.9 kg/ha Roundup Plantshield |
| # | Variety |
Treatment 1
|
Treatment 2
|
Oil (%) | Grain yield (t/ha) | Lodging (0-9) |
|---|---|---|---|---|---|---|
| 1 | █ GT50 | █ Stubble incorporated + 240 kg/ha urea | █ Topdressed 150 + 130 kg urea/ha | 41.3 | 2.5 | 7 |
| 2 | █ GT50 | █ Stubble incorporated + 240 kg/ha urea | █ Topdressed 210 + 130 kg urea/ha | 42.2 | 2.9 | 6 |
| 3 | █ GT50 | █ Stubble burnt, no N | █ Topdressed 210 + 130 kg urea/ha | 44.1 | 3.3 | 2.5 |
| 4 | █ GT50 | █ Stubble burnt, no N | █ Topdressed 150 + 130 kg urea/ha | 46 | 3.4 | 1 |
| Rainfall avg ann (mm) | 375mm |
|---|---|
| Rainfall avg gsr (mm) | 232mm |
| Rainfall trial total (mm) | 470.5mm |
| Rainfall trial gsr (mm) | 340.3mm |
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.
