Earthworms and Plant Residues Modify Nematodes in Tropical Cropping Soils Madagascar: A Mesocosm ExperimentReport as inadecuate




Earthworms and Plant Residues Modify Nematodes in Tropical Cropping Soils Madagascar: A Mesocosm Experiment - Download this document for free, or read online. Document in PDF available to download.

Applied and Environmental Soil ScienceVolume 2010 2010, Article ID 323640, 7 pages

Research Article

Institut de Recherche pour le Développement IRD, UMR 210 Eco&Sols INRA, IRD, SupAgro, 2 place Viala, 34060 Montpellier cedex 1, France

Centre National de Recherche Appliquée au Développement Rural FOFIFA, URP SCRID, BP 230, Antsirabe 110, Madagascar

Institut de Recherche pour le Développement IRD, UMR 210 Eco&Sols INRA, IRD, SupAgro, LEMSAT IRD, ISRA, centre de Bel-air, BP 1386 Dakar, Senegal

Received 17 July 2009; Accepted 4 December 2009

Academic Editor: Natchimuthu Karmegam

Copyright © 2010 Cécile Villenave et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Free-living nematodes present several characteristics that have led to their use as bioindicators of soil quality. Analyzing the structure of nematofauna is a pertinent way to understand soil biological processes. Earthworms play an important role in soil biological functioning and organic matter dynamics. Their effects on soil nematofauna have seldom been studied. We studied the effect of the tropical endogeic earthworm, Pontoscolex corethrurus, on nematode community structure in a 5-month field mesocosm experiment conducted in Madagascar. Ten different treatments with or without earthworms and with or without organic residues rice, soybean were compared. Organic residues were applied on the soil surface or mixed with the soil. The abundance of nematodes bacterial and fungal feeders was higher in presence of P. corethrurus than in their absence. The type of plant residues as well as their localisation had significant effects on the abundance and composition of soil nematodes. The analysis of nematode community structure showed that earthworm activity led to an overall activation of the microbial compartment without specific stimulation of the bacterial or fungal compartment.





Author: Cécile Villenave, Bodo Rabary, Emilie Kichenin, Djibril Djigal, and Eric Blanchart

Source: https://www.hindawi.com/



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