The relationship between nitrogen rate and the need for disease control in winter wheat

2007 - 2008
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Brett Davey (TIAR/SFS)
Geoff Dean (TIAR/SFS)
Simon Munford (DPIWE)
Nick Poole (FAR NZ)
Year(s) 2007 - 2008
Contributor Southern Farming Systems
Trial location(s) Hagley, TAS
The relationship between nitrogen rate and the need for disease control in winter wheat locations
Aims

To determine the relationship between nitrogen rate and the need for disease control in winter wheat in the high rainfall zone environment of Tasmania.

Key messages

In an irrigated trial on Mackellar (feed wheat) at Hagley, Tasmania, plot yields ranged from 6.6 – 9.4 t/ha depending on the level of nitrogen and fungicide input. There was a significant response to nitrogen application, with an optimum that varied from 60 ‐120 kg/ha depending on whether fungicide was applied. There was a significant yield interaction (P=0.003) between the amount of applied nitrogen and the level of fungicide input, whereby the higher the level of applied nitrogen the greater was the need for fungicide input. Without fungicide application at stem elongation the optimum nitrogen input for the crop was 60 kg/ha N; however with fungicide application it was at least 90 kg/ha N. There was a significant increase in grain protein associated with increasing nitrogen level in the range of 60 ‐120 kg/ha N and a significant increase in protein associated with fungicide application.

Lead research organisation N/A
Host research organisation N/A
Trial funding source GRDC
Related program N/A
Acknowledgments

Grains Research and Development Corporation for project funding and James and Peter Clutterbuck for provision of land.


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Fungicide: Rate
  • Fungicide: Type
Trial type Experimental
Trial design Replicated

Hagley 2007

Sow date 25 May 2007
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Hagley 2008

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Variety
Treatment 1
Grain yield (t/ha)
1 Mackellar Opus, 90kgN/ha 9.09
2 Mackellar Opus, 60kgN/ha 8.69
3 Mackellar Opus, 30kgN/ha 8.01
4 Mackellar Opus, 120kgN/ha 9.14
5 Mackellar Opus, 0N 7.21
6 Mackellar Opus + F500, 90kgN/ha 9.09
7 Mackellar Opus + F500, 60kgN/ha 8.75
8 Mackellar Opus + F500, 30kgN/ha 8.27
9 Mackellar Opus + F500, 120kgN/ha 9.42
10 Mackellar Opus + F500, 0N 7.44
11 Mackellar Nil fungicide, 90kgN/ha 7.38
12 Mackellar Nil fungicide, 60kgN/ha 7.67
13 Mackellar Nil fungicide, 30kgN/ha 7.25
14 Mackellar Nil fungicide, 120kgN/ha 7.1
15 Mackellar Nil fungicide, 0N 6.62

Grain yield t/ha


Loading
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Hagley, TAS Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Hagley, TAS Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Hagley TAS
2008 251.5mm
2007 262.7mm
2006 273.5mm
2005 283.2mm
2004 307.3mm
2003 302.1mm
2002 371.2mm
2001 481.6mm
2000 540.3mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

Loading

Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Hagley TAS

NOTE: Exact trial site locality unknown - Climate data may not be accurate
Loading
Loading
Loading

Some data on this site is sourced from the Bureau of Meteorology

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.

Trial report and links

2007 trial report



Trial last modified: 06-11-2019 12:02pm AEST