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

2015

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) 2015
Contributor Riverine Plains
Trial location(s) Site 2, Dookie, VIC
Site 3, Yarrawonga, VIC
Monitoring the performance of nitrogen application to wheat under full stubble retention locations
Aims

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

Key messages
  • At both Yarrawonga and Dooke, Victoria, there was no yield response to nitrogen application, with yields of 4.34 and 3.88t/ha respectively.
  • Although there was no yield response, there was a significantly higher dry matter (DM) production and greater nitrogen offtake as a result of applying nitrogen at both sites.
  • The maximum nitrogen offtake in the unfertilised crops at both sites equated (approximately) to the level of available nitrogen at the start of the season during April (assessed 0-60cm).
  • The normalised difference vegetation index (NDVI) response assessed at first node stage (GS31) and the subsequent divergence of NDVI suggested that both sites would benefit from additonal nitrogen; however, late moisture stress and high temperatures compromised any potential yield response.
  • The NDVI canopy scores taken at Dookie during October 2015 from the 120kg N/ha plots clearly show are more rapid senescence than unfertilised crops (control) or those crops fertilised with 60 kg N/ha.
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, 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 2015

Sow date 19 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Dookie 2015

Sow date 19 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Yarrawonga 2015

Sow date 22 April 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Yarrawonga 2015

Sow date 22 April 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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 yield, protein, screening and hectolitre weight at Yarrawonga in 2015

# Treatment 1
Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 0kg N/ha 8.6 4.34 78 7.3
2 60kg N/ha 11.2 4.45 78.4 11.1
3 120kg N/ha 14.1 4.23 75.9 19.8

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of nitrogen timing on grain yield, protein, screening and hectolitre weight at Yarrawonga in 2015

# Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 N @ Z00 and Z30 11.2 4.39 77.5 12.4
2 N @ Z30 and Z33 11.4 4.29 77.3 13

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of nitrogen rate on grain yield, protein, screening and hectolitre weight at Dookie in 2015

# Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 0kg N/ha 10.2 3.93 84.2 4.2
2 60kg N/ha 11.9 3.96 82.8 4.9
3 120kg N/ha 13.2 3.57 81.5 7.2

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of nitrogen timing on grain yield, protein, screening and hectolitre weight at Dookie in 2015

# Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 N @ Z00 and Z30 12 3.9 82.8 5.4
2 N @ Z30 and Z33 11.5 3.9 83 5.4

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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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

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Climate

Site 2, Dookie VIC 2015


Observed climate information

Rainfall trial gsr (mm) 386mm

Site 2, Dookie VIC 2015


Observed climate information

Rainfall trial gsr (mm) 386mm

Site 3, Yarrawonga VIC 2015


Observed climate information

Rainfall trial gsr (mm) 266mm

Site 3, Yarrawonga VIC 2015


Observed climate information

Rainfall trial gsr (mm) 266mm

Derived climate information

Site 2, Dookie VIC

Site 3, Yarrawonga VIC

Site 2, Dookie VIC

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Site 3, Yarrawonga VIC

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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 11:22am AEST