Publications des scientifiques de l'IRD

Dieng A., Baudoin E., Thioulouse J., Brunet Didier, Toucet Joële, Sylla S. N., Brauman Alain. (2015). Soil organic matter quality, structure and activity of the denitrifiers community as influenced by decaying mulched crop residues. Applied Ecology and Environmental Research, 13 (3), p. 655-675. ISSN 1589-1623.

Titre du document
Soil organic matter quality, structure and activity of the denitrifiers community as influenced by decaying mulched crop residues
Année de publication
2015
Type de document
Article référencé dans le Web of Science WOS:000354731000004
Auteurs
Dieng A., Baudoin E., Thioulouse J., Brunet Didier, Toucet Joële, Sylla S. N., Brauman Alain
Source
Applied Ecology and Environmental Research, 2015, 13 (3), p. 655-675 ISSN 1589-1623
Our experiment evaluated the effect of maize and peanut mulched residues upon soil organic matter and denitrifying community over a five-week incubation in soil microcosms. Soil organic matter under peanut and maize debris contrasted in biochemical quality throughout incubation, despite identical soil C contents that were significantly increased by both organic amendments. Moreover, only soluble extracts originating from the peanut treated soils could significantly fuel semi-potential denitrification. Accordingly, the composition of the nirK and nosZ communities was also specifically affected by mulch type, and the strongest impact was registered within the nosZ gene-bearing denitrifiers under peanut residues. Residue enriched soils displayed temporal patterns of potential denitrification activity that were also dependant on residue type. The highest overall emission rates were recorded with soils under maize mulch but they were not mirrored by direct N2O contents of the microcosm's headspace. Overall, both soil organic matter and denitrifiers community changes were conditioned throughout the decomposition kinetics by the original quality of mulched crop residues. However, the denitrification activity was decoupled both from the composition of the denitrifying community and from the soil organic matter quality.
Plan de classement
Pédologie [068]
Description Géographique
SENEGAL
Localisation
Fonds IRD [F B010064233]
Identifiant IRD
fdi:010064233
Contact