Irrigation Discussion Group Focus Paddock - Impact of nitrogen rate & timing on irrigated barley

2021

Research organisatons
Funding source

Trial details

Researcher(s) N/A
Contact email charlie.aves@irrigatedcroppingcouncil.com.au
Contact phone 0416400979
Year(s) 2021
Contributor Irrigated Cropping Council
Trial location(s) Frances 2021,
Irrigation Discussion Group Focus Paddock - Impact of nitrogen rate & timing on irrigated barley locations
Aims

Different nitrogen rates and application timings will be examined to determine which management approach can maximise yield without compromising the end market.

The intention is to observe how such treatments impact yield and grain quality of irrigated barley.

Key messages

Following a lucerne crop, the crop was responsive to additional nitrogen inputs. With a background soil nitrogen level of 66kg N/ha, we were able to maximise yield with only the addition N. We saw a significant improvement in yield with the application of 46kg N/ha, however, applications above this were insignificant.

The addition of nitrogen also influenced grain quality. The most dramatic response was the increase in grain screenings with the increasing rates as well as the increasing grain protein with the increased rates of nitrogen.

We struggled to find any standout significant differences with the application timings. Whilst not significant, the plots that received nitrogen at GS00 and GS31 did appear to perform better and showed greater levels of vigour.

Lead research organisation Irrigated Cropping Council
Host research organisation MacKillop Farm Management Group
Trial funding source GRDC ICF1906-002RTX
Related program N/A
Acknowledgments N/A
Other trial partners Pinion Advisory
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Barley
Treatment type(s)
  • Crop: Nutrition
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Frances 2021 2021

Sow date 20 May 2021
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser

Treatment variables were nitrogen rates and application timings.

The different timings of application consisted of at seeding (GS00), first node (GS31) and flag leaf (GS37) different combinations were used at different rates to see where we can optimise grain yield and quality.

Nitrogen rate was the other variable. We used 4 different rates. 46kg of N per ha, 92 kg of N per ha, 138 kg of N per ha and 184 kg of N per ha. We also had 0kg of N per ha as a control.

The maximum rate was calculated to try and achieve a potential yield of 10t/ha. This was done by taking account of the nitrogen in the soil profile down to 90cm. This value of available nitrogen was then subtracted off what N was required per tonne of yield (using industry standards) to give us the amount required to be top dress fertiliser. These calculations made an assumption that 50kg N may become available from the mineralisable pool within the soil.

Herbicide

Applied to all plots:

20-May-2021: Roundup PowerMAX - 2l, Goal - 75ml, Overwatch - 1.25l

10-Aug-2021: Starance Advanced - 300ml, Triathlon - 750ml

 

Insecticide

Applied to all plots:

20-May-2021: Lorsban 500EC - 500ml

10-Aug-2021: Alpha Duo - 125ml

16-Sep-2021: Karate Zeon - 30ml

Fungicide

Applied to all plots:

10-Aug-2021: Aviator Xpro - 400ml

16-Sep-2021: Aviator Xpro - 400ml

Pesticide

Applied to all plots:

20-May-2021: Metarax - 5kg, Mouseoff Zinc Prosphide bait - 1kg

 

Seed treatment 150ml/100kg seed Systiva + 240ml Gaucho 600 Red Flowable
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
Frances 2021, Not specified
Derived trial site soil information
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.

Frances 2021

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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

Event Date Type Effect
Frost events

The trial experienced frost events on the following dates: -1.5 °C on Jul 9, -2.4 °C on Jul 10, -0.2 °C on Jul 21, -0.6 °C on Aug 27, -0.7 °C on Sep 5, -1.2 °C on Sep 14, -0.9 °C on Sep 16, -1.8 °C on Sep 26, -0.1 °C on Oct 10, -2.1 °C on Oct 11, -1.2 °C on Oct 12, -0.3 °C on Oct 25, -0.5 °C on Oct 30

09-07-2021 Mild frost N/A
Heat

This trial experienced extreme heat conditions on the following dates: 33.7 °C on Nov 2, 34 °C on Nov 5, 34.6 °C on Nov 18, 33.5 °C on Nov 22, 33 °C on Nov 24, 33.9 °C on Nov 28, 37.6 °C on Nov 29, 39.9 °C on Nov 30, 40.2 °C on Dec 1

02-11-2021 Heat event N/A


Trial last modified: 23-05-2023 11:42am AEST