Report - DCE - Nationalt Center for Miljø og Energi

on information from the Danish Plant Directorate, which is provided on information
from the farmers. Is has to be mentioned that data regarding 2010
is the same as 2009 and have to be considered as preliminary estimtate. 2010
data will be implemented when data is available.
The structural development in the agricultural sector has an influence in
change of housing types. The trend in housing system for dairy cattle goes
from older tied-up housings, which is replaced by bigger housings with
loose-holding. In 1985 85% of the dairy cattle were kept in tied-up housings
and in 2010 the part is reduced to 12%. In loose-holding systems the cattle
have more space and more straw bedding and this will in general increase
the NH3 emission per animal compared to the tied-up housings. In table
2C.2 the distribution of housing type for dairy cattle and fattening pigs from
1985-2010 is listed.
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The emission from housings is thus determined by a number of different
conditions that depends on housing type and the different kinds of manure
disposal systems placed in these housings. Danish Centre for Food and Agriculture,
Aarhus University has carried out a number of emission surveys
and estimated emission coefficients for each type of housings (Poulsen et al.,
2001 and Poulsen, 2011). In table 2C.3 is shown the emission factors for the
most important animal categories; dairy cattle and fattening pigs in different
housing systems. For the slurry and liquid manure is given TAN emission
factors (TAN ex animal) and for solid and deep litter manure is given N ex
animal.