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Titre :
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Nitrogen transformations and losses following pig slurry applications to a natural soil filter system (Solepur process) in Brittany, France
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Auteurs :
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D. Chadwick ;
T. Van Der weerden ;
José Martinez ;
B. Pain
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Type de document :
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article/chapitre/communication
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Année de publication :
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1998
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Format :
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p. 85-93
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Langues :
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= Anglais
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Catégories :
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Environnement
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Mots-clés :
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EPANDAGE
;
LISIER
;
CYCLE DE L'AZOTE
;
LESSIVAGE DU SOL
;
DENITRIFICATION
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Résumé :
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The soil filter system, Solepur, has been shown to be highly successful at removing organic matter and nitrogen (N) from pig slurry during its first five years of operation. The system involves three operations; application of large volumes of pig slurry to a managed field; collection and treatment of the nitrate-rich leachate; and irrigation of the treated water over other fields. The purpose of this study was to determine the environmental implications of applying excessive volumes of slurry to the managed field and to improve the understanding of the N cycle in the soil filter system. Nitrous oxide (N2O) and ammonia (NH,) emissions were measured from the managed field following two slurry applications under different soil conditions. Denitrification losses, nitrate leaching, N uptake by plants and soil immobilization of N were determined and methane (CH4) emissions were measured.
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Source :
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Journal of Agricultural Engineering Research, vol.69
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