Emission factors for poultry for modelling and reporting

The emission factors below should be used for carrying out ammonia assessments and for calculating your emissions for the Emissions Inventory reporting.

These factors are subject to change as further information becomes available, only the emission factors on the website at the time of your application will be considered valid.

Ammonia - poultry housing

Housing type  Ammonia Emission Factor (kg NH3/animal place/year) 
Layers 

  

Cage with deep pit manure storage beneath 

0.29 

Ventilated deep pit 

0.20 

Manure removal twice a week by manure belt 

0.035 

Vertical tiered cages with forced air drying once a week removal 

0.035 

Vertical tiered cages with whisk forced air drying once a week removal 

0.09 

Vertical tiered cages with manure belt with drying tunnel over cage 24-36 hour removal 

0.035 

Barn and free range 

  

Perchery with deep litter 

0.29 

Litter system with forced air drying 

0.12 

Litter system with perforated floor and forced air drying 

0.10 

Aviary system 

0.08 

Free range ranging area 

0.045 

Broilers 

  

Naturally ventilated, fully littered floor, non-leaking drinkers 

0.034 

Fan ventilated, fully littered floor, non-leaking drinkers 

0.034 

Pullets 

  

Naturally ventilated, fully littered floor, non-leaking drinkers 

0.06 

Fan ventilated, fully littered floor, non-leaking drinkers 

0.06 

Manure removal twice a week by belt 

0.04 

Turkeys 

  

Male 

0.45 

Female 

0.23 

Ducks 

0.11 

 

Ammonia - poultry manure storage 

Manure storage Kg NH3/tonne fresh manure

Manure - belts 

2.38 

Manure - deep pit 

2.38 

Other 

1.74 

 

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