1. Nutrient balance for nitrogen TAPAS action – Statistics Belgium in collaboration with the Institute for Agriculture and Fisheries Research 11 June Kathleen Gybels

2. Content Point of departure and objectives
Gross N balance: in- and output factors
Gross N balance: data sources and methodology
N balance at NUTS 3
Results of N balance in Belgium
Conclusion

3. Point of departure and objectives
ILVO
results presented in this report
<
(Vervaet et al, 2006)
Flemish Region
Walloon Region
Brussels C-Region
NUTS 1
NUTS 3
NUTS 1 = NUTS 3
this TAPAS project
Belgium = Flemish Region + Walloon Region + Brussels C-Region

4. Gross nutrient balance: in- and output factors
Other
organic
fertilizers
Biological
N fixation
Animal
N production
Inorganic
Ammonia
emission
SOIL
SURPLUS
Crop removal
Nutrient metabolism in agricultural soil
Seeds and
planting
material
Atmospheric
N deposition

5. Gross N balance: data sources and methodology
Main data source: FSS-data (livestock numbers and crop areas)
data available for the three regions
data at farm level→ can be aggregated at NUTS 1 and NUTS 3
use of ‘generic’ classification codes as a solution for frequently changing codification

6. Gross N balance: data sources and methodology
Other data sources: regional institutes, organizations & manure legislation
different definitions
f.e. livestock N excretion coefficients FL: without N losses
WAL: takes N losses into account
different units
f.e. livestock N excretion coefficients FL: kg N per average present animal
WAL: kg N per stable place
different formats
f.e. WAL: atmospheric N deposition data in grid 5x5km
FL: atmospheric N deposition rates per municipality

7. N balance at NUTS 3
Coefficients at NUTS 3: often same values as for the regional level
f.e. crop production (kg dry matter per ha per crop type)
Statistical discrepancy between NUTS 1 and NUTS 3
Dynamic databases: different date of extraction of the data
f.e. Manure Bank NUTS 1: published in annual report
NUTS 3: personal communication
Different data sources at NUTS 1 and NUTS 3
Data at NUTS 1 are often more reliable
Less data available at NUTS 3

8. N balance at NUTS 3: availability of data
FL NUTS 3
WAL NUTS 3
Livestock N production
Inorganic fertilizer use
Other fertilizers /
Atmospheric N deposition
2006
1990, 1996, 2000, 2004
Seed use
Biological N fixation
Manure export, import and processing
Crop removal
Ammonia emission

9. Results N input factors in Belgium

10. Results: soil surplus in Belgium 1990 -2006

11. Livestock N production at NUTS 3 in 2006

12. Inorganic fertilizer use at NUTS 3 in 2006

13. Conclusion N balance at NUTS 1:
Refinement of Flemish gross N balance (TAPAS 2004)
Calculation of Walloon gross N balance (Walloon manure import, export, processing are lacking)
Estimation of N balance of Brussels Capital-Region
Belgian N balance = Flanders + Walloon Region + Brussels Capital-Region
N balance at NUTS 3:
A first attempt to gather the necessary data and coefficients
FL: most data available from 2000 until 2006
WAL: some data not available for this project

14. Thank you for your attention! Any questions?