Avaliação das alterações físicas e químicas em diferentes substratos utilizados no cultivo das minhocas Eisenia andrei (Bouché 1972) e Eudrilus eugeniae (Kinberg 1867).

Abstract

The creation of cities and the increasing expansion of urban areas have contributed to the growth of negative environmental impacts. To ensure the minimization of trashdeposition, to replenish soil nutrients that are lost as a consequence of the various disastrous human practices, some methods are adopted, such as domestic composting and vermicomposting, alternatives that bring multiple benefits, reducing up to 75% volume of organic waste deposited in landfills. Considering the large amount of Domestic Organic Residue (ROD) and Organic Residue (RO) produced in the residences and in the rural properties respectively, it was thought to test new substrates, using as a technique the adaptation of two species of earthworms Eisenia andrei and Eudrillus eugeniae (African giant) which are the most used in the vermicompost process and to know which of the substrates would be the most appropriate. The objective of this work was to evaluate the physical and chemical changes in the different substrates during the vermicompost process under different concentrations of the Eisenia andrei (Bouché 1972) and Eudrilus eugeniae (Kinberg 1867) worms grown on different substrates. The work began in August 2015, with the installation of the experiment of E. andrei and Eudrillus eugeniae species with duration of 60 days. After the first 30 days the final biomass was realized, which includes the counting of earthworms, cocoons and humus collection for physical and chemical analysis. A completely randomized experimental design was used, with two earthworm species, E. andrei and E. eugeniae, with population levels of 0, 10 and 15 earthworms / pot and two evaluation dates (30 and 60 days), with three replications And 5 treatments, totaling 45 experimental units. According to the values found in our study, the substrates that are best suited for the creation and management of earthworms are the goat manure and sawdust + organic matter, with adequate humidity, pH and TCz, respectively.