Publications des scientifiques de l'IRD

Gilot Villenave Cécile, Lavelle P., Ganry F. (1996). Effects of a tropical geophagous earthworm, Millsonia anomala, on some soil characteristics, on maize-residue decomposition and on maize production in Ivory Coast. Applied Soil Ecology, 4, p. 201-211. ISSN 0929-1393.

Titre du document
Effects of a tropical geophagous earthworm, Millsonia anomala, on some soil characteristics, on maize-residue decomposition and on maize production in Ivory Coast
Année de publication
1996
Type de document
Article
Auteurs
Gilot Villenave Cécile, Lavelle P., Ganry F.
Source
Applied Soil Ecology, 1996, 4, p. 201-211 ISSN 0929-1393
Maize was grown under field conditions in the presence and absence of the tropical endogenic earthworm Millsonia anomala (Omodeo and Vaillaud, 1967) in soil of a secondary forest of central Ivory Coast. Experimental units were isolated by PVC sheets to limit earthworm movements. Decomposition and redistribution of nitrogen from maize crop residues incorporated in the soil were monitored using 15N-labelled residues. The density of M. anomala decreased from 50 to 15.9/m2 during the cultivation period (90 days). Activity of M. anomala significantly modified the structure of the soil by increasing the proportion of large aggregates (over 2 mm in diameter). Maize production was increased by 12% for stalks and 18% for grains in the presence of earthworms. Nitrogen contained in the maize residue was more efficiently used by plants grown in the presence of earthworms ; the real coefficient of utilisation of the organic residue increased from 9 to 11% in the presence of M. anomala. Nonetheless, total nitrogen exportation was not significantly different between the two treatments. Furthermore, N from the organic residues left after the cultivation period was less easily assimilated by plants in treatments with earthworms. (Résumé d'auteur)
Plan de classement
Macrofaune [074FAUSOL03] ; Agronomie générale [076AGRO]
Descripteurs
FAUNE DU SOL ; LOMBRIC ; STRUCTURE DU SOL ; TEXTURE DU SOL ; CARACTERISTIQUE CHIMIQUE ; RELATION SOL PLANTE ; MAIS ; NUTRITION MINERALE ; AZOTE ; PRODUCTION AGRICOLE
Description Géographique
COTE D'IVOIRE
Localisation
Fonds IRD [F B010008812] ; Bondy ; Montpellier (Centre IRD)
Identifiant IRD
fdi:010008812
Contact