Electromagnetism induction (EMI) is a non-invasive geophysical technique for the study of the spatial distribution of the physico-chemical properties of the soil. This work is based on reports of apparent electrical conductivity (ECa) of the soil, measured using a GSSI Profiler EMP-400, with the abiotic and biotic parameters of the soil (earthworms). The experiment was conducted in nine commercial vineyards within the region of Languedoc-Roussillon (France) conducted according to different soil management: grass cover, chemical weeding and tillage. The abundance of earthworms stood between 0 and 283 individuals per m2. The biomass recorded values between 0 and 105 g m-2. Strong relationships between the values of ECa and the abundance and biomass of anecic and endogeic earthworms were found, particularly in grass covered and chemically weeded plots. This result is supported by the high coefficients of determination found (R2 from 0.53 to 0.94). Our results suggest that the EMI signal, which is an integrated value of the physicochemical parameters of soil, represents a real opportunity to reduce the number of laborious sampling of earthworms, ensuring accuracy of the estimate of the average values of earthworm parameters and their spatial distribution in field.
Relazioni tra elettromagnetismo indotto (EMI) e popolazioni di lombrichi in vigneti della Francia Meridionale
CELANO, Giuseppe
2012-01-01
Abstract
Electromagnetism induction (EMI) is a non-invasive geophysical technique for the study of the spatial distribution of the physico-chemical properties of the soil. This work is based on reports of apparent electrical conductivity (ECa) of the soil, measured using a GSSI Profiler EMP-400, with the abiotic and biotic parameters of the soil (earthworms). The experiment was conducted in nine commercial vineyards within the region of Languedoc-Roussillon (France) conducted according to different soil management: grass cover, chemical weeding and tillage. The abundance of earthworms stood between 0 and 283 individuals per m2. The biomass recorded values between 0 and 105 g m-2. Strong relationships between the values of ECa and the abundance and biomass of anecic and endogeic earthworms were found, particularly in grass covered and chemically weeded plots. This result is supported by the high coefficients of determination found (R2 from 0.53 to 0.94). Our results suggest that the EMI signal, which is an integrated value of the physicochemical parameters of soil, represents a real opportunity to reduce the number of laborious sampling of earthworms, ensuring accuracy of the estimate of the average values of earthworm parameters and their spatial distribution in field.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
