Papers considered
Four papers were presented to the panel for consideration:
- new emission factors for direct N2O from excreta
- units for direct nitrous oxide emission factor for urea
- nitrogen retention
- equation for methane emissions from anaerobic effluent ponds.
Outcomes
- Recommendations regarding EF3 emission factors and methodology were not approved. The panel decided further clarification of values and methodologies was required for points 17 and 18 of the paper.
- The panel agreed to the recommendation to alter point 19 of the IPCC 2006 guidelines regarding urea.
- Regarding the nitrogen retention paper, the panel:
- did not agree with the recommended updates to (a) and (b) N retained in liveweight gain: cattle and sheep as they were not well-backed by the reporting
- were concerned about adopting (c) N retained in liveweight gain: deer as the recommendation was based on a study which included deer not prevalent in New Zealand
- suggested changes should be made to (d) dairy cattle % crude protein of milk
- were concerned about (e) beef cattle % crude protein of milk as it contained data from breeds not found in New Zealand
- agreed with the recommendation in (f) sheep % crude protein of milk but asked that additional analysis be done
- recommended (g) deer % crude protein of milk be calculated from breeds prevalent in New Zealand
- accepted (h) N retention in wool, provided the figure in the paper is quoted from the ARC report
- noted that recommendation (i) N velvet % needed to account for the conversion factor for dry matter
- accepted recommendation (j) deer growth period.
- Recommendations from point 12 were noted by the panel.
Find out more
Copies of the papers presented to the panel, and the minutes taken, are included below.
