The researches presented in this paper aimed to study the way how some elements of agricultural technology (chemical and organic fertilisation) influence the earthworm abundance in soil, organisms which are great bioindicators of soil fertility. The goal of the paper was rigorously observe the changes appeared in earthworm abundance in order to enunciate the effect of different agricultural technologies in the sense of their promotion or renunciation if negatively influence the life from soil. These considerations were imposed because at worldwide level the soil fertility in continuous decrease, and on the background of conventional agriculture that was practiced during last decades, it became more and more acute the problem of soil fertility. The experiments were placed within Didactic and Experimental Station of the University of Agricultural Sciences and Veterinary Medicine of Banat Timişoara, on a cambic chernozem in oat culture. The results showed that earthworm number (individuals/m 2 ) and weight (g/m 2 ) registered higher values in the experimental plots with organic fertilization. The research methodology that was used respects the actual legislation and protocols in force. The statistic connections between the researched factors were realized by statistical meth­ods, consisting of dispersion analysis ANOVA (Analysis of Variance). For statistical calculation, the SPSS software (Statistical Package for the Social Sciences) was used. The objectives aimed by this research were established in order to bring a series of contributions to the sustainable regeneration of soils fertility, under aspect of its physical, chemical and biological properties, by using the biological means specific to the ecological agriculture system, and with the purpose to allow the establishment of the right directions, well scientifically argued, regarding the elimination of those sequences of agricultural technologies which negatively influence the biological activity from soil, in this present case the activity of earthworms, with the consequence of soil fertility decreasing.

earthworms, organic fertilization, chemical fertilization, earthworm number, earthworm weight

Presentation: oral