Determinación de una dosificación de trichoderma para tratamiento de suelos contaminados con piretroides.

Abstract

The following investigation's objective was to determine a dosage of Trichoderma spp for treatment of soils contaminated with Pyrethroids (Cypermethrin and Deltamethrin), the experiment that was developed in the Huachi Grande, canton Ambato, Tungurahua province. The initial phase consisted of mla Location and Georeference of strawberry cultivation. In the laboratory stage, reproduction was carried out from a commercial product (TricoFert) containing 4 cepas of Trichoderma spp. (Trichoderma harzianum, Trichoderma hamatum, Trichoderma sp and Trichoderma Koningii), physicochemical and biological analyzes were carried out to characterize the soil, and determined its influence on the growth of the Cepas Trichoderma in the soil during the treatment. In the trial, a transverse, experimental design based on a DCA with 5 repetitions and 4 treatments, T0 (control) was used; T1 (soil + pyrethroid + 2.5ml / L Trichoderma spp.); T2 (soil + pyrethroid + 5ml / L Trichoderma spp); T3 (soil + pyrethroid + 10m1L Trichoderma spp.), For the quantification and the realization of the statistical analyzes, the percentage of removal was obtained from the comparison of the initial concentrations and the final concentrations of the pyrethroids in the soil. The variable studied was the degradation of pyrethroids by Trichoderma spp expressed in Percentage of removal of the contaminant, by taking samples in each experimental unit it was determined that Treatment T1 obtained the best Percentage of removal of Cypermethrin was 29.07% while that of Deltamethrin was 35.26%, as the best treatment due to the enzymatic activity of diphenyl-dioxygen oxidoreductases, despite the lack of nutrients in the soil. It is recommended to carry out the treatment of soil contaminated with Pyrethroids with Trichoderma spp cepas, but controlling the intervention of the variables: Precipitation, pH, Temperature, Quantity Organic matter and nutrient, which influence the growth of the cepas in soil.