A reduction of crude protein in the diet while providing the essential amino acid levels for growth can successfully result in less nitrogen being excreted by the pig while maintaining productivity. Consequently, certain selected odorants will be also reduced. Improved nutrient utilization also contributes to economical pork production. This is achieved by reducing the crude protein of the diet and supplementing with synthetic amino acids. Prairie Swine Centre Inc. Odour control through the use of additives is an avenue that has to be better developed and investigated before it can be adopted as a standard practice.
Further research is required to evaluate the real potential and practicality of su ch products.
Their impact on feed intake and feed conversion has also to be investigated. Animal fats and oils added to the feed can reduce feed-dust generation. This dust provides a carrier for odour compounds and transports outside the building by the ventilation system. Feed additives such as calcium bentonite, zeolite and charcoal are formulated to adsorb odour-causing compounds such as ammonia. Some of the most promising feed additives are plant extracts, enzymes, and direct-fed microbials, all of which may help control odour and improve growth performance in animals.