| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.48 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Broiler farming is a significant source of gaseous emissions. The aim of this study was to
assess the effects of different litter additives on the emission of NH3, N2O, CO2, and CH4 during
broiler housing and subsequent manure storage. The gaseous emissions from the housing facilities
were evaluated during one fattening cycle in environmentally controlled rooms with three different
additives applied to the litter material (10% w/w aluminum sulphate or biochar and 2.50 mg m−2
urease inhibitor), as well as a control. A storage experiment was conducted under laboratory
conditions for 90 days to evaluate the influence of these three additives on gaseous losses. During
broiler housing, the results indicated that NH3 emissions were reduced significantly (40–60%) by
litter additives, while global warming potential (GWP) emissions were reduced significantly (31%)
by Alum. The addition of Biochar (a 58% reduction) had the same significant effect as Alum (a
60% reduction) to mitigate these losses. The re-application of Urease (a 41% reduction) may be
required to reach an equal or higher reduction. During storage, NH3 and GWP emissions were not
significantly affected by the litter additives. During broiler housing and subsequent manure storage,
NH3 emissions were reduced significantly (22–41%) by litter additives, whereas GWP emissions did
not decrease significantly. Globally, it can be concluded that Biochar appears to be a good alternative
to Alum due to its equal effectiveness in mitigating NH3 losses, without increasing the GWP potential
in the housing and avoiding pollution swapping.
Description
Keywords
aluminum urease inhibitor biochar ammonia broiler farming greenhouse gases