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
		
		
			
			
			New Zealand N Balances 1990-2010
			
			
			Bryan Stevenson
			
			
			Landcare Research 
			
			
			 1. Stevenson_National Scale N Balance_N... (1.00MB) 
			
		
		
			
			
			N efficiency at catchment and sub-catchment scales
			
			
			Troy Baisden
			
			
			GNS Science
			
			
			 2. Baisden-N-Efficiency-Catchment.pdf (4.23MB) 
			
		
		
			
			
			N efficiency: Paddock/farm system
			
			
			Stewart Ledgard
			
			
			AgResearch
			
			
			 3. Ledgard_Nitrogen  efficiency MPI meeting... (0.87MB) 
			
		
		
			
			
			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
		
		
			
			
			DairyNZ N efficiency
			
			
			Ina Pinxterhuis
			
			
			DairyNZ
			
			
			  5. DairyNZ contribution NZAGRC Increased N... (1.54MB) 
			
		
		
			
			
			Landcare Research work related to N use efficiency
			
			
			Paul Mudge
			
			
			Landcare Research
			
			
			 6. Landcare Research summary for N use eff... (1.26MB) 
			
		
		
			
			
			Current management and mitigation options to increase N efficiency
			
			
			Racheal Bryant
			
			
			Lincoln University
			
			
			 7. Lincoln University_ N efficiency Workshop... (1.10MB)
		
		
			
			
			Massey University N efficiency
			
			
			Mike Hedley
			
			
			Massey University
			
			
			  8. Massey University_ Nitrogen Use Efficiency... (1.68MB) 
			
		
		
			
			
			Nitrogen interventions in pastoral systems
			
			
			Diana Selbie
			
			
			AgResearch
			
			
			 9. AgResearch_N effciency workshop_April 2015.pdf (0.46MB) 
			
		
		
			
			
			Catchment-scale N attenuation
			
			
			Chris Tanner
			
			
			NIWA
			
			
			 10. NIWA-Catchment-scale attenuation2015.pdf (3.21MB) 
			
		
		
			
			
			Increased N efficiency in pastoral systems
			
			
			Steve Thomas
			
			
			Plant & Food Research
			
			
			 11. Plant Food Research_ N use efficiency... (1.82MB) 
			
		
		
			
			
			N immobilisation and enhancing denitrification
			
			
			Louis Schipper
			
			
			Waikato University
			
			
			 12. Waikato University_N efficiency... (1.44MB) 
			
		
		
			
			
			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)