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Interrill erosion of carbon and phosphorus from conventionally and organically farmed Devon silt soils

Experiments in Earth surface process research

Auteur(s) et Affiliation(s)

KUHN, N.J.
Dep. of Environmental Sciences, Univ., Basel, Suisse
ARMSTRONG, E.K.
Dep. of Environmental Sciences, Univ., Basel, Suisse
LING, A.C.
Sediment Research Facility, Univ., Exeter, Royaume-Uni
CONNOLLY, K.L.
Sediment Research Facility, Univ., Exeter, Royaume-Uni
HECKRATH, G.
Univ., Aarhus, Danemark


Description :
In this study, the P and organic C content of sediment generated from 2 Devon silts under conventional (CS) and organic (OS) soil management were examined. Artificial rainfall was applied to the soils using 2 rainfall scenarios of differing intensity and kinetic energy to determine the effects on the P and C enrichment in interrill sediment. Interrill soil erodibility was lower on the OS, irrespective of rainfall intensity. Sediment from both soils showed a significant enrichment in P and C compared to the bulk soil. A comparison of soil and sediment properties indicates that crusting, P and C content as well as density and size of eroded aggregate fragments control P and C enrichment. Due to complex and dynamic interactions between P, soil organic carbon (SOC) and interrill erosional processes, the nutrient and C status of sediments cannot be predicted based on soil P content, SOC or interrill erodibility alone.


Type de document :
Article de monographie

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 91, p. 94-103, nombre de pages : 10, Références bibliographiques : 88 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)