Monitoring the response of nitrogen application to wheat under full stubble retention

2014

Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole, Michael Straight and Tracey Wylie (FAR Australia), Casandra Schefe (Riverine Plains), Sarah Noack and Peter Hooper (Hart Field-Site Group), Sam Trengove (SPAA)
Year(s) 2014
Contributor Riverine Plains
Trial location(s) Site 2, Dookie, VIC
Site 3, Yarrawonga, VIC
Monitoring the response of nitrogen application to wheat under full stubble retention locations
Aims

To monitor the response of nitrogen application to wheat under full stubble retention.

Key messages
  • Two first-wheat trials sown early-mid May showed significant increases in yield where nitrogen was applied. However, the timing of nitrogen application or whether the nitrogen was applied as a single or split application, gave no difference in yield.
  • Normalised difference vegetation index (NDVI) assessments showed no difference in crop reflectance (crop canopy greeness) due to timing of nitrogen application. However, there were NDVI differences due to the rates of nitrogen applied at the key growth stages (GS31 and GS33) where additonal nitrogen could still be applied to the crop to assist in reaching yield potential.
  • Nitrogen timing had no effect on tiller and head numbers; however, a split application produced a taller crop canopy.
  • Higher rates of nitrogen produced more dry matter (DM) and increased plant uptake of nitrogen, but the timing of application did not affect DM and nitrogen uptake.
Lead research organisation Commonwealth Scientific and Industrial Research Organisation
Host research organisation N/A
Trial funding source GRDC
Related program Maintaining profitable farming systems with retained stubble
Acknowledgments

Thanks to the farmer co-operators, Mark Harmer (Dookie, Vic) and the Inchbold family (Yarrawonga, Vic).


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

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Dookie 2014

Sow date 15 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication 4
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Yarrawonga 2014

Sow date 8 May 2014
Harvest date Not specified
Plot size Not specified
Plot replication 4
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Download the trial report to view additional method/treatment information

Download results

Trial results Effect of nitrogen rate on grain parameters at Yarrawonga 2014

# Treatment 1
Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL)
1 0kg N/ha 9.5 5.02 6.9 80.4
2 60kg N/ha 10.5 5.48 6.5 80.2
3 120kg N/ha 11.5 5.77 5.5 79.8

Grain yield t/ha


Loading

Protein %


Loading

Screenings %


Loading

Test weight kg/hL


Loading

Trial results Effect of nitrogen rate on grain parameters at Dookie 2014

# Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL)
1 0kg N/ha 7.1 4.83 2.7 81.8
2 60kg N/ha 8.2 5.97 2.1 81.7
3 120kg N/ha 9.8 6.17 1.9 79.7

Grain yield t/ha


Loading

Protein %


Loading

Screenings %


Loading

Test weight kg/hL


Loading
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 2, Dookie, VIC Not specified
Site 3, Yarrawonga, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 2, Dookie, VIC Sodosol
Site 3, Yarrawonga, VIC Sodosol
National soil grid Source
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

Site 2, Dookie VIC 2014


Observed climate information

Rainfall trial gsr (mm) 386mm

Site 3, Yarrawonga VIC 2014


Observed climate information

Rainfall trial gsr (mm) 372.8mm

Derived climate information

Site 2, Dookie VIC

Site 3, Yarrawonga VIC

Site 2, Dookie VIC

Loading
Loading
Loading

Site 3, Yarrawonga VIC

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 last modified: 28-11-2019 11:27am AEST