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Updating Chapter 10 09 of the Atmospheric Emission Inventory Guidebook

Ulrich Dämmgen1 and Nicholas John Hutchings2UN ECE Task Force on Emission Inventories and Projections,Agriculture and Nature Panel1Federal Agricultural Research Centre , Institute of Agroecology, Braunschweig, Germany2Dept of Agroecology, Danish Institute of Agricultural Sciences, Research Centre Foulum, Tjele, Denmark.

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State of the present chapter

The present

chapter 10 09

Manure Management Regarding Nitrogen Compounds

dates from 2002

Aims of the new version:

  • Updating the data base
  • Improving the calculation procedure

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  • Structure of the present chapter remains unchanged
  • Compounds considered: ammonia, nitric oxide, nitrous oxide
  • Minor changes: Definitions extended
  • Major change: Detailed methodology revised

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Comprehensive treatment of the nitrogen flow in animal husbandry

means

All N compounds in ONE calculation procedure, which is related to energy balance and C flow calculations

Calculation procedures shall not contradict other existing UN ECE documents and shall be in in line with IPCC methodologies.

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  • The detailed method is a “stepwise approach” (cook book approach)
  • Identification of relevant animal numbers
  • (proposing relevant subcategories)
  • Calculation of the amount of N excreted per animal or place in the house, in yards or during grazing and
  • calculation of the TAN excreted per animal or place in the house, in yards or during grazing
  • including inputs with bedding material and various housing systems for most animal categories

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Housing

In the animal house, only NH3 emissions are considered.

Relative emission factors are obtained from other UN ECE documents (such as the Framework Advisory Code of Good Agricultural Practice).

Absolute figures are proposed for the reference system

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  • Storage
  • Calculation of the amount of N immobilized in solid systems and of the N emitted as N2O, NO and NH3 during storage considering various storage types for liquid and solid systems
  • N2O emissions are treated as in the IPCC guidelines (transformation to TAN based emission factors necessary)
  • NO emission factors “ordered“ (will be available in time)

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Application

Only NH3 emissions directly related to spreading are considered.

Relative emission factors are obtained from other UN ECE documents (such as the Framework Advisory Code of Good Agricultural Practice).

Absolute figures are proposed for the reference system.

When the N has passed the soil surface, subsequent emissions are treated as emissions from plants and soil.

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Most tables in the present 10 09 are placeholders, to be discussed between the expert panel members in the near future (volunteers needed!).

10 09 will contain an appendix with national values (as before). This appendix will also be updated in order to cover a wider geographical area (volunteers needed).

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  • What needs to be done?
  • The IPCC draft version of Modul 4 of the 2006 Guidelines is likely to be available soon. Data are to be compared and incorporated (N excretion defaults; N2O emission factors)
  • The chairmen will try to write a final draft in May 2006.
  • The chapter will be circulated and discussed between … (volunteers) and sent to the Task Force secretariat in July/August.

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  • Promised in the Guidelines:
  • Technical support
  • A worked example of the use of these steps is provided at the TFEIP web-site
  • Questions likely to remain open:
  • Treatment of poultry in the detailed methodology

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