| Researcher(s) |
James Brinkhoff (Centre for Regional ) John Hornbuckle (Moulamein irrigation farmer) Laura Kaylock (Western Murray Land Improvement Group) Leigh Vial (Moulamein irrigation farmer ) |
|---|---|
| Year(s) | 2017 |
| Contributor | Western Murray Land Improvement Group Inc. |
| Trial location(s) |
Mallan, NSW
|
| Related trials |
A winter wheat trial was established to assess the whole-season nitrogen (N) availability against different nitrogen placement strategies when subject to waterlogging.
Higher apparent N recovery efficiency was recorded in the topdressed treatments than the mid-row banded treatments, particularly the one topdressed early before waterlogging (TDE). There was no real difference in the N recovery between the MRB rates (190 and 290 kg/ha).
| Lead research organisation | N/A |
|---|---|
| Host research organisation |
Western Murray Land Improvement Group Inc. |
| Trial funding source | GRDC 9175353 |
| Trial funding source | Murray Irrigation Limited |
| Trial funding source | Murray Local Land Services MY0080 |
| Related program | N/A |
| Acknowledgments |
The authors thank GRDC, Murray LLS and Murray Irrigation for supporting the trial. |
| 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 | 85 kg/ha |
|---|---|
| Sowing machinery |
Bettinson Disc Drill |
| Sow date | 16 May 2017 |
| Harvest date | 5 December 2017 |
| Plot size | 4m x 20m |
| Plot replication | 4 |
| Plot randomisation | A split plot design, with waterlogging treatments in the main plots, and nitrogen treatments in the sub-plots. |
| Fertiliser |
All plots were sown with MAP 1% Zn at 150 kg/ha in the seed row. The topdressed early (NTE), topdressed late (NTL) and mid-row banding (MRB150) plots had 290 kg/ha of Urea applied. The mid-row banding (MRB104) had 190 kg/ha of Urea applied. Topdressing treatments were applied between DC31-32, 150NTE before the waterlogging event and 150NTL prior to a small rainfall event. Mid-row banding treatments were applied at sowing. |
| Herbicide |
Glyphosate 450 at 1.6 L/ha plus Nail at 30 mL/ha and LI700 @ 350mL/100L was used to control weeds pre-sowing. Axial at 300mL/ha plus Agidor at 500mL/100L, a selective herbicide for grass weeds, was applied on July 10th. |
| Insecticide |
Insect control was provided using Dominex Duo at 125mL/ha to control blue-green aphids and a later application (July 19th) of Chlorpyrifos at 1.2L/ha to control Russian Wheat Aphids. |
| Fungicide |
MAP 1% Zn was treated with Impact at 4 L/t at sowing for fungal suppression. |
| Pesticide |
Zinc phosphide mouse bait was spread twice during the season.
|
| Tillage | Minimum Till |
| # |
Treatment 1
|
Treatment 2
|
Chlorophyll content index (CCCI) (.) |
|---|---|---|---|
| 1 | █ Non-waterlogged | █ No fertiliser | 0.56a |
| 2 | █ Waterlogged | █ No fertiliser | 0.54a |
| 3 | █ Non-waterlogged | █ 190 kg/ha N mid-row banded | 0.62b |
| 4 | █ Waterlogged | █ 190 kg/ha N mid-row banded | 0.59b |
| 5 | █ Non-waterlogged | █ 290 kg/ha N mid-row banded | 0.63b |
| 6 | █ Waterlogged | █ 290 kg/ha N mid-row banded | 0.59b |
| 7 | █ Non-waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 0.65b |
| 8 | █ Waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 0.64c |
| 9 | █ Non-waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 0.62b |
| 10 | █ Waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 0.61b |
| # |
Treatment 1
|
Treatment 2
|
Grain nitrogen (kg/ha) |
|---|---|---|---|
| 1 | █ Non-waterlogged | █ No fertiliser | 28a |
| 2 | █ Waterlogged | █ No fertiliser | 26a |
| 3 | █ Non-waterlogged | █ 190 kg/ha N mid-row banded | 54b |
| 4 | █ Waterlogged | █ 190 kg/ha N mid-row banded | 52b |
| 5 | █ Non-waterlogged | █ 290 kg/ha N mid-row banded | 60b |
| 6 | █ Waterlogged | █ 290 kg/ha N mid-row banded | 49b |
| 7 | █ Non-waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 84c |
| 8 | █ Waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 83c |
| 9 | █ Non-waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 68bc |
| 10 | █ Waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 65bc |
| # |
Treatment 1
|
Treatment 2
|
Grain yield (t/ha) |
|---|---|---|---|
| 1 | █ Non-waterlogged | █ No fertiliser | 1.7a |
| 2 | █ Waterlogged | █ No fertiliser | 1.8a |
| 3 | █ Non-waterlogged | █ 190 kg/ha N mid-row banded | 2.9b |
| 4 | █ Waterlogged | █ 190 kg/ha N mid-row banded | 3.3b |
| 5 | █ Non-waterlogged | █ 290 kg/ha N mid-row banded | 3.4b |
| 6 | █ Waterlogged | █ 290 kg/ha N mid-row banded | 3.2b |
| 7 | █ Non-waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 4.1b |
| 8 | █ Waterlogged | █ 290 kg/ha N topdressed early before waterlogging | 4.3b |
| 9 | █ Non-waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 3.4b |
| 10 | █ Waterlogged | █ 290 kg/ha N topdressed late after waterlogging | 3.7b |
| Rainfall avg ann (mm) | 310mm |
|---|---|
| Rainfall avg gsr (mm) | 150mm |
| Rainfall trial total (mm) | 376mm |
| Rainfall trial gsr (mm) | 121mm |
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.
