Researcher(s) |
Suzanne Holbery (SARDI) Nigel Wilhelm (SARDI) |
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Year(s) | 2013 |
Contributor | SARDI Minnipa Agricultural Centre |
Trial location(s) |
Minnipa Agricultural Centre, SA
|
Related trials |
To determine the comparative performance of alternative crops and pastures as pest and disease breaks in an intensive cereal phase.
Lead research organisation |
South Australian Research and Development Institute |
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Host research organisation |
SARDI Minnipa Agricultural Centre |
Trial funding source | GRDC DAS00119 |
Related program |
Crop Sequencing Initiative |
Acknowledgments |
We would like to thank Ian Richter and Wade Shepperd for their technical support. |
Other trial partners | Not specified |
Crop type | Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Replicated |
Sow rate or Target density | 55kg/ha |
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Sow date | 14 May 2013 |
Harvest date | 29 October 2013 |
Plot size | 1.5m x 40m |
Plot replication | 3 |
Fertiliser |
65 kg/ha DAP (18:20:0:0) on 14 May. Five treatments that had not had any legume break phase (2x continuous wheat, vetch/oats mix followed by wheat, oats then canola and canola then oats) in the previous two years also received 50 kg/ha of urea at sowing to compensate for any nitrogen deficiency. |
Herbicide |
One month post-sowing the Kord plots were sprayed with Intervix @ 0.7 L/ha. The entire trial was sprayed for broadleaf weeds with MCPA+ diflufenican @ 0.75 L/ha on 4 July and any treatment that had had a medic break phase received an additional herbicide application the following day of clopyralid 0.08 L/ha to target volunteer medic. Seven treatments (Angel medic/wheat, oats/canola, oats/peas, Jaguar medic/wheat, canola/peas, peas/wheat and peas+canola/wheat) with high levels of grassy weeds were subsequently sprayed with grass selective cloqintocet-mexyl + pyroxsulam @ 0.5 L/ha. Grassy weeds were measured in three ways to gain a greater understanding of what was occurring within rotations. Prior to sowing soil was collected from the west end of each plot to assess weed seed banks. They were grown out in a shade house where emerged plants were counted and recorded. The counting process was repeated following three times of emergence 22 May, 30 May and 3 July. The second assessment was undertaken in the field plots on 20 August when grass species were counted and recorded for each plot, and thirdly on 25 September panicle counts of grass weeds were completed as a measure of potential seed bank for the 2014 season. |
# | Variety |
Treatment 1
|
Weeds (plants/m2) | Grain yield (t/ha) |
---|---|---|---|---|
1 | █ Wheat:Mace | █ Chem FALLOW/V.Pasture Graze | 2.6 | 2.87 |
2 | █ Wheat:Mace | █ CANOLA Grain/OATS Graze | 6.8 | 2.735 |
3 | █ Wheat:Mace | █ CANOLA Grain/EARLY SOWN MEDIC Graze | 3.7 | 2.564 |
4 | █ Wheat:Mace | █ FIELD PEA Grain/OATS Graze | 4.3 | 2.531 |
5 | █ Wheat:Mace | █ EARLY SOWN MEDIC Hay/OATS Graze | 3.8 | 2.455 |
6 | █ Wheat:Mace | █ MEDIC Hay/REG MEDIC+CANOLA Graze | 4.1 | 2.409 |
7 | █ Wheat:Mace | █ OATS Hay/FIELD PEA Grain | 21.8 | 2.407 |
8 | █ Wheat:Mace | █ CANOLA Grain/FIELD PEA Grain | 6.7 | 2.382 |
9 | █ Wheat:Mace | █ OATS Hay/EARLY SOWN MEDIC Graze | 18.8 | 2.374 |
10 | █ Wheat:Mace | █ FIELD PEA Grain/CANOLA Grain | 9.2 | 2.321 |
11 | █ Wheat:Mace | █ FIELD PEA+CANOLA Hay/WHEAT Grain | 19.2 | 2.23 |
12 | █ Wheat:Mace | █ SULLA/SULLA Graze | 5.6 | 2.229 |
13 | █ Wheat:Mace | █ EARLY SOWN MEDIC Hay/CANOLA Grain | 7.2 | 2.213 |
14 | █ Wheat:Mace | █ FIELD PEA Grain/WHEAT Grain | 35.6 | 2.195 |
15 | █ Wheat:Mace | █ JAG MEDIC Seed/WHEAT Grain | 25.5 | 2.134 |
16 | █ Wheat:Mace | █ ANG MEDIC Seed/WHEAT Grain | 31.2 | 2.1 |
17 | █ Wheat:Mace | █ OATS Hay/CANOLA Grain | 34.1 | 2.098 |
18 | █ Wheat:KordCLPlus | █ VETCH+OATS Hay/WHEAT Grain | 8.8 | 1.818 |
19 | █ Wheat:KordCLPlus | █ CONTROL WHEAT B Grain | 39.2 | 1.692 |
20 | █ Wheat:KordCLPlus | █ CONTROL WHEAT A Grain | 41.9 | 1.631 |
Rainfall trial gsr (mm) | 237mm |
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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.