Transcript No Slide Title
INVENTORIES OF CH
4
, N
2
O and NH
3
FROM UK AGRICULTURE Tom Misselbrook, Lorna Brown IGER, North Wyke
GHG Inventory Construction CH
4
• Predominantly Tier 1 methodology • Tier 2 methodology for cattle and lambs • Dairy cattle EF vary from year to year (liveweight and milk yield multipliers) • Other cattle have constant EF • EF for lambs assumed at 40% that for adult sheep. Lambs assumed to live for 6 months.
GHG Inventory Construction N
2
O - Animal Waste Management Systems
• UK-specific N excretion values used for livestock categories • 20% of total N excreted assumed to volatilise as NH 3 NO x and therefore deducted prior to N 2 or O loss calculations • Distribution of manure into different AWMS based on UK survey data • IPCC default EFs used for each AWMS category
N
2
O - Agricultural soils
• Follows IPCC methodology
NH
3
Inventory Construction
• Detailed methodology • Not N flow model • Largely empirical emission factors - derived from UK research •Not good for scenario testing
NH
3
Inventory Construction
•
Excel based
• 1 worksheet for Version log • 1 worksheet for all input data • calculation worksheets for different sectors (cattle , pigs, sheep, etc.,) • Summary results sheets • by sector • by AWMS
Ammonia Emission Inventory - Total NH 3 Total losses from cattle E & W
Grazing losses (kt): Total land-spreading losses(kt): Total housing losses (kt): Total storage loss(kt):
Total Loss (kt):
7.72
46.35
33.50
7.57
95.15
Total losses from sheep (incl. goats & deer)
Total upland grazing losses (kt): Total lowland grazing losses (kt): Total landspreading losses (kt): Total housing losses (kt): Total storage loss (kt):-
Total Loss (kt):-
2.01
7.12
0.98
1.15
0.05
11.31
Total losses from horses 3.29
2001
Cattle Sheep Horses
UK
10.56
66.35
47.68
12.19
136.79
2.83
10.03
1.38
1.62
0.07
15.92
3.73
Total losses from pigs
Loss from outdoor pigs(kt): Total land-spreading losses(kt): Total housing losses (kt): Total storage loss(kt):
Total Loss (kt): Total losses from poultry
Total outdoor losses (kt): Total spreading losses (kt): Total housing losses (kt): Total storage losses (kt):
Total Losses (kt):
0.90
5.98
14.49
1.06
22.43
0.17
17.60
16.31
0.29
34.36
Total losses from conserved grassland
Applications to conserved grassland Early applications to grazed land
Total Loss (kt): Total losses from tillage crops Total Losses (kt):
8.89
1.82
10.71
14.70
Grand Total (kt): 191.95
Poultry Conserved Grass Tillage Crops
kt NH3
Pigs 0.94
6.90
17.08
1.63
26.55
0.19
21.60
19.22
0.36
41.38
12.61
2.64
15.24
17.20
256.81
N excretion (kt) Cattle 662 Sheep (incl. goat & Deer)256 Pigs Poultry Horses 53 127 12
Total AWMS
Fertiliser
1109.8
AWMS kt NH 3 emission liquid 55.6
0.0
8.0
0.0
0.0
63.6
daily spread 9.7
0.0
2.6
0.0
0.0
solid storage and drylot 60.9
3.0
15.1
0.0
0.0
pasture range and paddock 10.6
12.9
0.9
0.2
3.7
12.3
79.0
28.3
other 41.2
41.2
Total from UK agriculture total ammonia emission (kt) 136.8
15.9
26.6
41.4
3.7
224.4
32.4
256.8
New Model - NARSES
• N flow model • model core engine with user interface • Spatial resolution (10km grid) and monthly timesteps • Include abatement measures for scenario testing
Activity data (for all inventories)
• Agricultural Census data (annual survey) • Fertiliser use (annual survey) • Management practice data (survey/expert opinion)
Welcome to the June Agricultural Census
The data published on these pages is produced and maintained by the Farming Statistics Team at Defra, Foss House, York. If you have any questions about the census or have any comments on these web pages please contact the team on the following e-mail link [email protected]
or on telephone 01904 455313.
Latest June Results Add to favourites
•
47 categories (livestock & crops)
•
RSD and 95% confidence intervals
•
Good spatial resolution if required
British survey of fertiliser practice Fertiliser use on farm crops for crop year 2000
These files are saved in Portable Document Format (pdf) . To read them you will need a copy of the "Acrobat Reader" software. Click here to download a copy.
Foreword, acknowledgements, contents, list of tables & executive summary
Section A: The British survey of fertiliser practice
Section B: Commentary on fertiliser use in Great Britain
Section C: Tables
Section D: Supplementary survey analysis on fertiliser spreader calibration and testing
Appendix 1: Survey statistics
•
standard errors for average crop
application rates
Appendix 3: BSFP regions in Scotland
•
regional resolution ?
Appendix 4: UK farm classification scheme
This page was last updated on 29 October 2001
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Other Issues Emission Factors
• GHG - Should we use more UK-specific EFs from ongoing research. In particular, fraction of deposited NH 3 which is leached (0.3 IPCC) appears too high.
• NH 3 - How frequently should we revise EFs with new research data?
• All - move towards modelling EFs from management and environmental data. Could combine data from different countries.
Other Issues Other sources
• Hard standings used by livestock - significant for NH 3
Linking GHG and NH
3
inventories
• More powerful scenario testing
Documentation
Details of annual changes Derivation of emission factors detailed Sources of all input data given