ReIationships between ferrisol properties and the structure of plant parasitic nematode commmties on sugarcane in Martinique ( French West Indies )

The relationships between the structural variations of a fenisol and the plant parasitic nematode communities of sugarcane were studied along three transects. These transects, about 20 m long, started in horizon A and ended in a levelled area where horizon C began. Results were analysed with the Co-inertia analysis method, which allowed us to study simultaneously the soil and nematode data. Progressive variations of the content of some physico-chemical soil elements (organic matter, phosphorus, pH) appear linked to those of the abundance of some nematode species (Heniicricoloideszenioides and Prarylenclzus). This analysis also shows relations that do not vary according to a gradient along the transects. For instance, the abundance of Helicotylenclius can be correlated with the existence of high calcium grades.