| Researcher(s) |
Amanda Cook (SARDI) Ian Richter (SARDI) Wade Shepperd (SARDI) |
|---|---|
| Year(s) | 2015 |
| Contributor | Eyre Peninsula Agricultural Research Foundation |
| Trial location(s) |
Minnipa Agricultural Centre, SA
|
| Related trials |
The GRDC project ‘Maintaining profitable farming systems with retained stubble - upper Eyre Peninsula’ aims to produce sustainable management guidelines to control pests, weeds and diseases while retaining stubble to maintain or improve soil health, and reduce exposure to wind erosion. The major outcome to be achieved is increased knowledge and skills allowing farmers and advisers to improve farm profitability while retaining stubble in farming systems on upper Eyre Peninsula (EP).
The Minnipa Agricultural Centre (MAC) S7 stubble retention trial was established to maintain or improve crop production through applying alternative weed, disease and pest control options in pasture wheat rotations in the presence of crop residues. The trial was established in 2013 with wheat and different stubble treatments imposed at harvest annually. It was sown either inter row or on row with wheat in 2014 and 2015 to determine the impacts of stubble management on crop production, weeds, disease and pests in low rainfall farming systems.
| Lead research organisation |
Eyre Peninsula Agricultural Research Foundation |
|---|---|
| Host research organisation |
SARDI Minnipa Agricultural Centre |
| Trial funding source | GRDC EPF00001 |
| Related program |
Maintaining profitable farming systems with retained stubble |
| Acknowledgments |
Thank you to Sue Budarick for processing samples. Trial funded by GRDC Maintaining profitable farming systems with retained stubble - upper Eyre Peninsula (EPF00001). |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow rate or Target density | 60kg/ha |
|---|---|
| Sowing machinery |
Plot seeder |
| Sow date | 12 May 2015 |
| Harvest date | 11 November 2015 |
| Plot size | 18m x 2m |
| Plot replication | 3 |
| Fertiliser |
DAP @ 60 kg/ha All plots were split with urea being added to one half at 40 kg/ha applied at seeding. This rate was estimated to match estimated annual nitrogen tie up with the retained stubble loads. Since 5.8 kg N is required per tonne of stubble to break it down (Kirby et al. 2004), for 3.5 t/ha of wheat stubble approximately 20 kg N is required, or may have been tied up due to the stubble being present in the retained stubble treatments. An extra 20 kg/ha of urea was spread on all plots on 9 June 2015. The decision to add extra nitrogen as a split treatment was made after reviewing the 2014 season results |
| Herbicide |
1.2 L/ha Roundup Attack and 2.5 L/ha Boxer Gold on 12 May. 750 ml/ha Tigrex and 100 ml/ha Lontrel on 23 July |
| Insecticide |
Nil |
| Fungicide |
Nil |
| Soil amelioration |
Nil |
| # |
Treatment 1
|
Late dry matter (kg/m2) | Screenings (%) | Yield (t/ha) | Early dry matter (kg/m2) | Yellow leaf spot ((0-10)) | Protein (%) | Test weight (kg/hL) | Plant Establishment (plants/m2) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | █ Stubble standing high | 0.43 | 5.7 | 1.19 | 0.01 | 6 | 11.1 | 79.6 | 65 |
| 2 | █ Stubble standing low | 0.41 | 4.3 | 1.28 | 0.01 | 5.4 | 11 | 79.8 | 71 |
| 3 | █ Stubble cultivated | 0.42 | 5.2 | 1.26 | 0.01 | 5.4 | 10.1 | 80.2 | 45 |
| 4 | █ Stubble removed | 0.43 | 5 | 1.2 | 0.01 | 4.3 | 11 | 80.5 | 73 |
| 5 | █ Inter row | 0.41 | 4.9 | 1.24 | 0.01 | 5.1 | 10.9 | 80.2 | 65 |
| 6 | █ On row | 0.43 | 5.3 | 1.22 | 0.01 | 5.4 | 11.1 | 79.9 | 62 |
| 7 | █ No extra N | 0.4 | 5.9 | 1.22 | 0.02 | 5.3 | 10.6 | 80.2 | 75 |
| 8 | █ 60 kg/ha N | 0.44 | 4.3 | 1.25 | 0.01 | 5.3 | 11.4 | 80 | 52 |
| Rainfall avg ann (mm) | 325mm |
|---|---|
| Rainfall avg gsr (mm) | 242mm |
| Rainfall trial total (mm) | 333mm |
| Rainfall trial gsr (mm) | 258mm |
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.
Plant Breeders’ Rights (PBR)
Some crop varieties used in research trials may be covered by Plant Breeders' Rights (PBR). Users should confirm PBR status of relevant varieties by searching the IP Australia PBR database, http://pericles.ipaustralia.gov.au/pbr_db/ or Variety Central (http://varietycentral.com.au/) and contacting variety owners for further information if required. Where possible, varieties have been listed according to their registered PBR name, although OFT cannot and does not guarantee that the information is accurate or complete.
Note that PBR cover is administered through the Plant Breeders’ Right Act 1994 (