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| Researcher(s) |
Tracie Bird (Gardiner (NSW DPI)) Greg Brooke (NSW DPI) Peter Matthews (NSW DPI) |
|---|---|
| Year(s) | 2015 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Coolah, NSW
|
| Further information | View external link |
| Related trials |
|
To determine the effect of N rate on the yield and grain quality of eight popular bread wheat varieties at Coolah in central NSW in 2015.
Nitrogen (N) is the nutrient most required by wheat. It is essential for growth and development, and yield and grain protein levels. In recent seasons in Central West NSW there has been a significant trend towards very low grain protein levels with more than 30% of grain receivals meeting ASW or lower specifications. Protein levels of <10.5% in a prime hard variety usually indicate that insufficient N levels have not only limited grain protein concentrations, but also yield. Soil testing for N levels before sowing remains an important budgeting tool. It is the most useful indicator if more applied N is needed to support crop growth and to maximise yield and grain protein potential within a given season. Consideration must also be given to starting soil water and target yield. This trial aimed to determine the effect of N rate on the yield and grain quality of eight popular bread wheat varieties at Coolah in central NSW in 2015.
Key findings:
Results:
There were moderate responses in grain protein to all rates of applied N in all varieties. The 40 kg N/ha at sowing + 40 kg N/ha in-crop treatment showed a significant increase in grain protein above the 40 kg N/ha at sowing only treatment in all varieties, but was not significantly different from the 80 kg N/ha at sowing treatment. Screening levels were low, with only Dart above 5% in some treatments. Dart, being the quickest variety in this trial, flowered and reached grain filling ahead of the other varieties, most likely causing it to be filling grain and losing green leaf during the hotter and drier part of September. The slower varieties probably benefited more from the late spring rains in this season
| Lead research organisation |
Department of Primary Industries NSW |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAN00129 |
| Trial funding source | DPI NSW |
| Related program |
Variety Specific Agronomy Packages for southern, central and northern NSW |
| Acknowledgments |
This research was funded by NSW DPI and GRDC under project DAN00129: Variety specific agronomy packages for new varieties in NSW. Thanks to Gavin Melville for biometric analysis and Ryan Potts, Lizzie Smith, Paddy Steele, Sally Wright and Rachel Hayden for technical assistance. |
| Other trial partners | Co-operator: "Binnia Creek" |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | 13 May 2015 |
|---|---|
| Harvest date | 8 December 2015 |
| Plot size | Not specified |
| Plot replication | Not specified |
| Psuedoreplication | Not specified |
| Fertiliser |
90 kg/ha Trifos at sowing |
| Insecticide |
300 g/ha pirimicarb (500 g/kg) 7 October (aphids) |
| Fungicide |
Prothioconazole (210 g/L) + tebuconazole (210 g/L) applied at 300 mL/ha on 14 September and 7 October |
| Other trial notes |
Treatments Variety:
Nitrogen (N): 0, 20, 40, 80, 160 kg N/ha at sowing, and 40+40 (40 kg N/ha applied at both sowing and GS31) Nitrogen applied as urea, pre-drilled immediately prior to sowing, with exception of the 40 + 40 treatment which had 40 kg N/ha pre-drilled at sowing and 40 kg N/ha top dressed at GS31. |
| # | Variety |
Protein (%) | Grain yield (t/ha) | Applied nitrogen (kg N/ha) | Screenings (%) |
|---|---|---|---|---|---|
| 1 | █ Dart | 12 | 4.1 | 0 | 4.9 |
| 2 | █ | 12.4 | 4.1 | 20 | 5.2 |
| 3 | █ | 12.9 | 4.1 | 40 | 5.2 |
| 4 | █ | 13.4 | 4.1 | 40+40 | 4.9 |
| 5 | █ | 13.2 | 4.1 | 80 | 5.4 |
| 6 | █ | 13.6 | 4.1 | 160 | 5.1 |
| 7 | █ EGA_Gregory | 10.8 | 4.4 | 0 | 2.8 |
| 8 | █ | 11.3 | 4.4 | 20 | 3.2 |
| 9 | █ | 11.7 | 4.5 | 40 | 3.1 |
| 10 | █ | 12.2 | 4.5 | 40+40 | 2.9 |
| 11 | █ | 12 | 4.5 | 80 | 3.3 |
| 12 | █ | 12.4 | 4.5 | 160 | 3 |
| 13 | █ Kiora | 11.7 | 4.2 | 0 | 3.5 |
| 14 | █ | 12.1 | 4.2 | 20 | 3.9 |
| 15 | █ | 12.6 | 4.2 | 40 | 3.8 |
| 16 | █ | 13.1 | 4.2 | 40+40 | 3.6 |
| 17 | █ | 12.9 | 4.2 | 80 | 4 |
| 18 | █ | 13.3 | 4.2 | 160 | 3.7 |
| 19 | █ Lancer | 12.7 | 3.8 | 0 | 2.6 |
| 20 | █ | 13.1 | 3.8 | 20 | 2.9 |
| 21 | █ | 13.6 | 3.8 | 40 | 2.9 |
| 22 | █ | 14.1 | 3.8 | 40+40 | 2.6 |
| 23 | █ | 13.9 | 3.8 | 80 | 3.1 |
| 24 | █ | 14.3 | 3.8 | 160 | 2.8 |
| 25 | █ Spitfire | 12.6 | 4.2 | 0 | 2.1 |
| 26 | █ | 13.1 | 4.2 | 20 | 2.5 |
| 27 | █ | 13.5 | 4.2 | 40 | 2.4 |
| 28 | █ | 14.1 | 4.2 | 40+40 | 2.2 |
| 29 | █ | 13.9 | 4.2 | 80 | 2.6 |
| 30 | █ | 14.2 | 4.2 | 160 | 2.3 |
| 31 | █ Sunmate | 11.2 | 4.3 | 0 | 3.1 |
| 32 | █ | 11.7 | 4.3 | 20 | 3.4 |
| 33 | █ | 12.1 | 4.3 | 40 | 3.4 |
| 34 | █ | 12.6 | 4.3 | 40+40 | 3.2 |
| 35 | █ | 12.5 | 4.3 | 80 | 3.6 |
| 36 | █ | 12.8 | 4.3 | 160 | 3.3 |
| 37 | █ Suntop | 10.9 | 4.2 | 0 | 2.6 |
| 38 | █ | 11.4 | 4.2 | 20 | 3 |
| 39 | █ | 11.8 | 4.3 | 40 | 3 |
| 40 | █ | 12.4 | 4.3 | 40+40 | 2.7 |
| 41 | █ | 12.2 | 4.3 | 80 | 3.1 |
| 42 | █ | 12.5 | 4.3 | 160 | 2.8 |
| 43 | █ Viking | 10.9 | 3.9 | 0 | 3.8 |
| 44 | █ | 11.4 | 3.9 | 20 | 4.1 |
| 45 | █ | 11.8 | 4 | 40 | 4.1 |
| 46 | █ | 12.3 | 4 | 40+40 | 3.8 |
| 47 | █ | 12.1 | 4 | 80 | 4.3 |
| 48 | █ | 12.5 | 4 | 160 | 3.9 |
| 49 | █ |
| Rainfall avg ann (mm) | 595.2mm |
|---|---|
| Rainfall avg gsr (mm) | 220.8mm |
| Rainfall trial gsr (mm) | 228mm |
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 (