A pig breeding model developed by an INRA research team supports efforts to reduce contaminants. The environmental problems linked to breeding activities are numerous and concern water pollution (nitrogen compounds, phosphorus, organic matter, micro-organisms, metallic trace elements), air pollution (ammonia, nitrogen monoxide, olfactory nuisances) and soil pollution (phosphorus, zinc, copper). A team from the Institut National de la Recherche Agronomique (INRA)1 in France has developed a model forpig breeding units that makes it possible to predict all fluxes of elements which might present a risk to the environment. This type of model can be used as a decision-making aid by breeders, or to test the usefulness of new production techniques.
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