Nitrogen Workshop
In April 2015, MPI commissioned the NZAGRC and PGgRc to organise a national workshop on our current understanding of N efficiency in pastoral systems.
The aim of the workshop was to bring together New Zealand’s leading nitrogen researchers to present their understanding of N efficiency in pastoral systems and to map their current work in integrated frameworks that represents the pathways within the nitrogen cycle at four different levels: national, catchment, farm and urine patch.
Presenters were also asked to identify the systems impacts and potential unintended consequences of proposed manipulations, and to identify where in the system the biggest gains can be made.
Following this overview, all attendees (including policy and industry stakeholders) then discussed potential knowledge gaps and new opportunities with particular focus on nitrate leaching and N2O emissions and their mitigation.
This page compiles the outcomes of the workshop, including the agenda, all presentations, an overview of the proposed interventions mapped within the four frameworks, and a summary list of key gaps and opportunities.
Contact for further information:
Cecile de Klein (AgResearch) cecile.deklein@agresearch.co.nz
Agenda & Summary
Agenda_NZAGRC-PGgRc_Increased N efficiency in... (0.48MB)
Summary of gaps and opportunities_N efficiency... (0.19MB)
Summary of N cycling interventions at different... (1.16MB)
Presentations
| Current understanding of N cycle and N efficiency | |
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New Zealand N Balances 1990-2010 Bryan Stevenson
Landcare Research |
1. Stevenson_National Scale N Balance_N... (1.00MB)
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N efficiency at catchment and sub-catchment scales Troy Baisden GNS Science |
2. Baisden-N-Efficiency-Catchment.pdf (4.23MB)
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N efficiency: Paddock/farm system Stewart Ledgard AgResearch |
3. Ledgard_Nitrogen efficiency MPI meeting... (0.87MB) |
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The urine-N cascade Tim Clough Lincoln University |
4. Clough_N use efficiency urine cascade.pdf (1.40MB) |
| Current management and mitigation options to increase N efficiency | |
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DairyNZ N efficiency Ina Pinxterhuis DairyNZ |
5. DairyNZ contribution NZAGRC Increased N... (1.54MB) |
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Landcare Research work related to N use efficiency Paul Mudge Landcare Research |
6. Landcare Research summary for N use eff... (1.26MB) |
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Current management and mitigation options to increase N efficiency Racheal Bryant Lincoln University |
7. Lincoln University_ N efficiency Workshop... (1.10MB) |
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Massey University N efficiency Mike Hedley Massey University |
8. Massey University_ Nitrogen Use Efficiency... (1.68MB)
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Nitrogen interventions in pastoral systems Diana Selbie AgResearch |
9. AgResearch_N effciency workshop_April 2015.pdf (0.46MB)
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Catchment-scale N attenuation Chris Tanner NIWA |
10. NIWA-Catchment-scale attenuation2015.pdf (3.21MB)
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Increased N efficiency in pastoral systems Steve Thomas Plant & Food Research |
11. Plant Food Research_ N use efficiency... (1.82MB)
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N immobilisation and enhancing denitrification Louis Schipper Waikato University |
12. Waikato University_N efficiency... (1.44MB)
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Impacts of N interventions on the C cycle Pete Smith University of Aberdeen |
13. Pete Smith UK_N-impacts-on-C-cycle_April... (1.09MB) |
