Fungos de solo impactado por resíduo de mandioca (Manihot Esculenta Crantz) em Santarém, Pará, Brasil

Abstract

The manipueira, a liquid extracted during the pressing of cassava, has a high content of organic matter and is highly toxic and, if improperly disposed of causes environmental damage. This research sought to identify the diversity of fungi present in soil impacted by manipueira in the municipality of Santarém, Pará, Brazil. The soil was deposited in two containers containing 20 L and the sampling took place periodically in a time scale before (ground control – M1) and after depositing the manipueira (exposed ground – M2) at times T0 (day 1), T1 (day 15), T2 (day 30) and T3 (day 45). One sample was taken from each container on the time scales until completing the 45th day and the analyzes took place at Laboratório de Bacteriologia of the Universidade Federal do Oeste do Pará. As a result, a total of 88 fungi were isolated, among which, 41 morphotypes were obtained from the M1 soil sample and 47 morphotypes from the assay soil. Among the fungi identified, the most frequent in M2 soil were Geotrichum sp. (30%) and Rhizopus sp. (17%). In the soil of sample M1, Penicillium sp. (27%) and Cunninghamella sp. (20%). There was greater diversity in treatment M2 than in treatment M1. Fungi live in the soil and perform key functions for the maintenance of earth's life, therefore, the importance of studies that will identify the present and active microbiota in toxic effluents is emphasized, as these may contain characteristics that could mitigate the damages. caused by the contamination of environments, revealing important ecological relationships and biotechnological applications.