Search results for "water-extractable organic matter"

showing 2 items of 2 documents

Compost Effect on Diuron Retention and Transport in Structured Vineyard Soils

2015

12 pages; International audience; Diuron is frequently detected in surface- and groundwater under the vineyards, where organic amendments are often used, in Burgundy of France. Undisturbed column experiments were conducted to study the influence of three composted organic amendments on diuron leaching through columns of two vineyard soils from Vosne-Romanée (VR, calcareous Cambisol) and Beaujolais (Bj, sandy Leptosol), France. Bromide (used as non-reactive tracer) and diuron breakthrough curves (BTCs) were analyzed using convectivedispersive equation (CDE), two-region (mobile-immobile, MIM) and two-site models. No influence of the composts was observed on the bromide recovery rates. The CDE…

Water flow[ SDV.SA.SDS ] Life Sciences [q-bio]/Agricultural sciences/Soil studySoil ScienceSoil science[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study010501 environmental sciencesengineering.material01 natural sciencessoil typeOrganic matterLeaching (agriculture)organic amendment0105 earth and related environmental sciencesLeptosolchemistry.chemical_classificationCambisolsorptionCompostgroundwater contamination04 agricultural and veterinary sciences15. Life on landSoil typeleachingchemistrySoil water040103 agronomy & agricultureengineeringwater-extractable organic matter0401 agriculture forestry and fisheriesEnvironmental sciencePedosphere
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Influence of biotic and abiotic factors on soil organic matter dynamics assessed by the biogeochemical characterisation of soluble organic matter

2014

Soils are the greatest reservoir of C on the continents, and organic matter mineralisation bymicrobial activity represents the major part of the CO2 emitted by terrestrial ecosystems.In this work, we studied water-extractable organic matter (WEOM), which corresponds to themore reactive fraction of soil organic matter (SOM). Our objectives were (i) to identify therelationships of WEOM dynamics with bacterial communities, and with soil physico-chemicalparameters; (ii) to provide a precise chemical characterisation of WEOM.There is a strong link between SOM solubility and the structure of bacterial communities, andan erosion of their diversity has an impact on SOM and WEOM dynamics, and leads …

Water-extractable organic matterMatière organique extractible à l’eau3D-fluorescenceFluorescence 3DMolecular characterisationBiogéochimie des solsFTICR-MSSoil biogeochemistry[SDU.STU] Sciences of the Universe [physics]/Earth SciencesCommunautés bactériennes13CCaractérisation moléculaireBacterial communities
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