Janeau Jean-Louis auteur aut IRD Gillard L.C. auteur aut IRD Grellier S. auteur aut IRD Jouquet Pascal auteur aut IRD Le Thi Phuong Quynh auteur aut IRD Luu Thi Nguyet Minh auteur aut IRD Ngoc Quoc Anh auteur aut IRD Orange Didier auteur aut IRD Pham Dinh Rinh auteur aut IRD Tran Duc Toan auteur aut IRD Tran Sy Hai auteur aut IRD Trinh Anh Duc auteur aut IRD Valentin Christian auteur aut IRD Rochelle Newall Emma auteur aut IRD text journalArticle eng text/pdf born digital access The export of dissolved organic carbon (DOC) from agricultural soils can represent an important pathway of soil organic carbon loss. However, despite its importance in terrestrial and downstream aquatic ecosystems, most work has focused on temperate agrosystems with tropical and sub-tropical ecosystems being ignored. Here we present the results of a series of rain simulation experiments aimed at examining DOC export from sloping lands in North Vietnam. Three regularly used agricultural practices were tested and compared with Bare soils. We also compared the impact of leaf litter in two planted forest sites. We found high rates of DOC export (0.03-0.25 g C m?2) during a 40 min rain episode with the lowest rates observed in the Bare soils and the highest in the planted Forest without leaf litter. This is equivalent to a loss of between 0.001 and 0.008% of the total soil organic carbon in the upper 10 cm during a single, intense rain event. This work highlights the impact of different agricultural practices (Bare soil, hoeing, mulching and fallow) and land use (planted Forest with or without leaf litter) on the export of DOC from upland, tropical soils and further underlines the importance of studying DOC fluxes from agricultural land as it represents an important and highly mobile component of ecosystem carbon fluxes. specialized DEGRADATION DU SOL NUTRIMENT EROSION HYDRIQUE MATIERE ORGANIQUE DISSOUTE CARBONE PENTE SIMULATION DE PLUIE PRATIQUE CULTURALE TRAVAIL DU SOL MULCH JACHERE SOL CULTIVE BASSIN VERSANT COUVERT VEGETAL ETUDE COMPARATIVE FORET AZOTE PHOSPHORE ALTITUDE ZONE DE MONTAGNE PERTE EN TERRE ZONE TROPICALE VIET NAM 068EROSOL 062MECEAU03 146 314-323 2014 0378-3774 https://www.documentation.ird.fr/hor/fdi:010063039 10.1016/j.agwat.2014.09.006 0378-3774 [F B010063039] https://www.documentation.ird.fr/hor/fdi:010063039 https://www.documentation.ird.fr/intranet/publi/depot/2014-10-07/010063039.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-10-07 2024-11-08 fdi:010063039 fre