Nutrition for Hyper Yielding Wheat

2021

Research organisaton
Funding source

Trial details

Researcher(s) Nick Poole
Darcy Warren
Year(s) 2021
Contributor Field Applied Research (FAR) Australia
Trial location(s) Wallendbeen, NSW
Nutrition for Hyper Yielding Wheat locations
Aims

To assess the value of higher nutrition input (N, P, K & S) for wheat in the growing season.
Individual objectives specific to the trials were:
- To assess the value of additional nutrients in the growing crop (set up as small plots at the HYC Research sites).
- To assess the value of adding increased P and K when targeting higher yield potential rather than N alone.

Key messages

 There was no yield response in winter feed wheat cv RGT Accroc to additional nutrient input above the standard N input of 168kg N/ha, which included a standard of 120kg/ha MAP at sowing (12N, 24P) despite yields of 9.5-10t/ha.
 The average yield of the trial in RGT Accroc was 9.47t/ha compared to 7.83t/ha in the milling wheat Rockstar trial (in surrounding commercial crop).
 Protein levels in the zero N plots (control) were significantly increased from 9.5% to 11.7 – 12.0% with the additional nutrients, but the increases were not associated with higher grain yields above standard nutrition (168N, 24P) in the feed wheat RGT
Accroc.
 With the farm crop milling wheat trial in Rockstar additional nutrition increased both yield and protein, even though protein was over %12.6.
 On average, protein levels were higher in the milling wheat Rockstar (13.6%) compared to the feed wheat RGT Accroc (11.3%).
 At harvest there were increased head numbers and dry matter production associated with greater nutrition input (cv RGT Accroc – feed wheat) but this did not lead to increased grain yield.
 There was no effect of additional nutrition on harvest index (data not presented), however the milling wheat Rockstar had higher harvest index (40.5%) compared to the feed wheat RGT Accroc (34.2%).
 The unfertilised crop of RGT Accroc had a N offtake in the grain of 129kg N/ha based on 7.74t/ha and 1.66% N in the grain (9.5% protein). If it is assumed that 25% of the N at harvest is in the straw and chaff then the unfertilised crop would have removed
approximately 172kg N//ha of which 59.3 kg N/ha was recorded in the soil core on 29th July (0-60cm) with 12kg N/ha provided by the MAP.
 This residual fertility in the farming system would explain why the standard nutrition control removed 242kg N/ha in the canopy (based on the same calculations) when only 168kg N/ha was applied as fertiliser.

Wallendbeen NSW 2021

Sown: 20 April 2021
Harvested: 5 January 2022
Rotation position: 1st Cereal after canola 2020
Soil type and management: Red clay loam – Kelly chained over summer
 

Lead research organisation Field Applied Research (FAR) Australia
Host research organisation N/A
Trial funding source GRDC FAR2004-002SAX
Related program FAR Hyper Yielding Crops 2020-2022
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Crop: Variety
  • Fertiliser: Rate
  • Fertiliser: Timing
  • Fertiliser: Type
  • Fungicide: Rate
  • Fungicide: Timing
  • Growth regulator: Type
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Wallendbeen 2021

Sow rate or Target density 180 seeds/m2 (150 plants/m2 target)
Sow date 20 April 2021
Harvest date 5 January 2022
Plot size Not specified
Plot replication Not specified
Fertiliser

Please see report for treatment details

Fungicide

Please see report for treatment details

Seed treatment Please see report for details
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Wallendbeen, NSW Red clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Wallendbeen, NSW Kandosol
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

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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.

Wallendbeen NSW

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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 report and links

2021 trial report



Trial last modified: 21-03-2023 10:53am AEST