The lumbricomposting is a technology to transform the organic wastes by the lumbricus in product rich in fertilizing elements. Our research aims to study the effect of lumbricus species belong to two ecologic groups anecic and endogic on some phsico-chimic parameters of lumbricompost in the basin of Ouargla, So, how far can these residues be valued by earthworms and which ecological groups can be used. The used treatments are prepared from a mixture of the soil and the vegetal wastes (the palm with olive wastes and wastes of the palm with poultry manure). The obtained results in the work indicated that the endogic species favor the reduction of salinity with regard to witness without lumbricus. The CE.e.1:5 is of 1,81± 0,28 dS.m-1 with lumbricompost and of 2,81± 0,28 dS.m-1 with the witness without lumbricus. The anecic species favor the mineralization of the matter and the organic carbon. The first is of the 4,23±1,59 % at the time that the second is of 2,46±0,93% comparable to witnesses which are of 11,11± 1,59 % and 6,46 ±0,93% successively. At last, we can say that only in the conditions of our test, the digradation of date palm and olive tree wastes is ensured by the anicic species but the one of date palm wastes with manure is done by the endogic species. lumbricompost in Saharan regions allow the improvement of the soil properties, the valorization of the agricultural waste and along-lasting development that respects the environment.

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