The heterogeneity of the properties of the coprolites Aporrectodea caliginosa and Lumbricus rubellus in model experiment with chernozem soil

The changes in the physical and microbiological properties of the coprolites of earthworms Aporrectodea caliginosa and Lumbricus rubellus were evaluated in laboratory experiments using the arable horizon of migratory-mycelial chernozem. In coprolites the following physical parameters were determined: particle size distribution, specific surface area, calculated by the effective particle diameter; microbiological parameters: the total number of cultured bacteria and the enzymatic kinetics of lipases according to the Michaelis -Menten model with the calculation of the maximum reaction rate (Vm) and Michaelis constant (Km). The model experiment included two stages: the first stage - earthworms of two species were kept together, in the second - separately. The control was the source soil and the soil with litter. Coprolites and the soil in which earthworms lived were analyzed and compared with the control. Two types of earthworms give a non-additive effect on physical and microbiological properties...