Effect of panicle initiation nitrogen timing on rice grain yield

2021

Research organisaton
Funding sources
AgriFutures New South Wales DPI <abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Brian Dunn
Tina Dunn
Contact email tina.dunn@dpi.nsw.gov.au
Year(s) 2021
Contributor Department of Primary Industries NSW
Trial location(s) Coree, NSW
Further information View external link
Effect of panicle initiation nitrogen timing on rice grain yield locations
Aims

Effect of panicle initiation nitrogen timing on rice grain yield

Key messages

• At all crop nitrogen levels applying nitrogen at panicle initiation (PI) increased grain yield above where no PI nitrogen was applied.
• When crop nitrogen levels are deficient applying nitrogen close to PI increased grain yield above later applications.
• The timing of PI topdressing nitrogen application had no effect on grain yield when crop nitrogen levels were adequate.

Coree NSW 2021

From these preliminary results we can conclude that a rice crop with a low N status requires N topdressing as close to PI as possible. The crop requires more time to use the added N to grow and increase dry matter and yield potential.
This experiment was designed mid way through the 2022 rice season when the question was asked ‘how late is too late to apply N after PI?’. Because of this, only 2 replications of the main plots were possible making it difficult to draw significant conclusions from the results. Therefore, further investigation of the effect PI N application timing has is required to fully identify the differences in treatments.

Lead research organisation Department of Primary Industries NSW
Host research organisation N/A
Trial funding source AgriFutures PRJ-013235
Trial funding source New South Wales DPI
Trial funding source GRDC
Related program N/A
Acknowledgments

This experiment was part of the ‘Agronomy and remote sensing to maximise rice water productivity’ project, PRJ-013235, 2021–24, with joint investment from AgriFutures and NSW DPI.
Thank you to Rice Research Australia Pty Ltd and Ben Heaslip for their support with this experiment.


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

Method

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

Coree 2021

Sow rate or Target density 140 kg/ha sowing rate
Sowing machinery

Disc drill seeder

Sow date Unknown
Harvest date Unknown
Plot size Not specified
Plot replication Not specified
Fertiliser

Please see report

Other trial notes

This research paper is an extract from the publication Southern NSW Research Results 2022, available at
https://www.dpi.nsw.gov.au/agriculture/broadacre-crops/guides/publications/southern-nsw-research-results

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
Coree, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Coree, NSW Sodosol
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.

Coree 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: 10-06-2023 20:14pm AEST