Odor Control for Dry Manure
Storage Practices - Diet Manipulation
| Pro |
Con |
| Source control strategy |
Limited to strategies that can maintain performance |
| Potentially less costly than post-excretion strategies |
Relatively new research field |
An alternative to filtration of emissions, as they leave housing
facilities, is the reduction of the concentration of odorous emissions
that can be produced upon anaerobic decomposition of the manure.
Manipulation of livestock diets to alter excretion composition,
and thus the odor of excretions, may be effective in housing areas.
Swine studies have identified trends towards reducing odor intensity
by reducing crude protein concentration. One study demonstrated
reduced concentrations of odorous compounds when swine diets were
formulated with crystalline amino acids, which caused a reduction
in the dietary crude protein concentrations. Odors should be reduced
after altering the composition of manure and reducing the amount
of odor precursors. Research to quantify reductions, after manure
has been stored, are limited but some suggest as much as 20 percent
odor reduction, when pigs are fed so as not to exceed their lysine
and methionine requirements.
Feedstuff selection may impact odor when manure is excreted or
during manure storage. Studies with both pigs and dairy cattle
demonstrated a trend of increasing odor intensity when diets contain
higher concentrations of bloodmeal due to the amino acids that
bloodmeal supplies in excess of animal needs when diets are formulated
on a lysine basis only. Other studies have found that addition
of peppermint to cattle diets improved odor of excreted manure.
Fermentation characteristics of barley resulted in improved manure
odor (25 percent reduction in odor intensity) compared to odor
intensity from cattle fed sorghum diets.
Dietary manipulation can reduce manure odors prior to excretion as
well as during manure storage, when anaerobic decomposition is taking
place and odorous intermediate compounds are being formed. However,
only a limited amount of research is currently available to indicate
which diet regimens or ingredients cause odor reduction.
Extension Publications
Abstracts, Conference Proceedings, Presentations and Reports
Journal Articles
Newsletter Articles
Other Links
|
