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REDUCTION OF NITROGEN OUTPUT IN PIG EFFLUENTS THROUGH A BETTER CONTROL OF DIETARY PROTEIN SUPPLY : TECHNICAL AND ECONOMICAL ASPECTS

Objective


About two thirds of the total nitrogen intake of pigs is excreted as liquid and solid wastes and gaseous ammonia. The pollution potential is such that it places limitations on the development of pig production. One approach to reducing pollution may be to minimize nitrogen output through manipulation of protein feeding whilst maintaining an optimum level of production performance. A model has been constructed for predicting nitrogen excretion by pigs which applied to breeding stock and growing and finishing pigs under French conditions. The principles of mathematical models for predicting protein and amino acid requirements in growing pigs and sows have been developed. The first growth and digestibility trials have been completed for minimizing total dietary protein input in combination with improved amino acid balance while maintaining optimum performance. The effect of dietary protein level on slurry loading and ammonia emissions is being assessed. A first evaluation has been made at the farm level of the economic impact of decreasing nitrogen output through protein feeding.

Coordinator

Institut National de la Recherche Agronomique (INRA)
Address
147 Rue De L'université
75341 Paris
France

Participants (10)

Bundesforschungsanstalt für Landwirtschaft
Germany
Address
Bundesallee 50
38116 Braunschweig
CHRISTIAN-ALBRECHTS UNIVERSITÄT KIEL
Germany
Address
Olshausenstraße 40
2300 Kiel
EUROLYSINE SA
France
Address
16 Rue Ballu
75009 Paris
Facoltà di Medicina Veterinaria
Italy
Address
Via S. Giacomo 11
40126 Bologna
Institut Technique des Céréales et des Fourrages
France
Address
8 Avenue Du Président Wilson
75116 Paris
RHONE POULENC ANIMAL NUTRITION
France
Address
20 Avenue Raymond Aron
92165 Antony
SANOFI SANTE NUTRITION ANIMALE
France
Address
126 Zone Industrielle De La Ballastiere
33501 Libourne
UNIVERSITÄT HOHENHEIM
Germany
Address

7000 Stuttgart
Union des Coopératives Agricoles d'Alimentation du Bétail
France
Address
Rue De L'eglise
02402 Château-thierry
Università Cattolica del Sacro Cuore
Italy
Address
Largo Agostino Gemelli 1
20123 Milano