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Effects of microplastics, vermicompost and zeolite on microflora of soils with different physical properties

Bulgarian Journal of Soil Science Agrochemistry and Ecology 2024
Jonita Perfanova, Katerina Doneva, Milena Kercheva, Hristo Valchovski

Summary

Researchers studied the effects of microplastics, vermicompost, and zeolite as additives on soil microflora and physical conditions in two soil varieties including Vertic Phaeozem clay, conducting laboratory experiments to compare how these inorganic, organic, and mineral amendments alter microbial communities.

The effect of additives of different composition and origin - non-organic (microplastics), organic (vermicompost) and mineral (zeolite) on microflora and soil physical conditions of two soil varieties was studied. A laboratory experiment was performed on soil samples, taken from the surface (0-20 cm) soil layer of Vertic Phaeozem (clay textural class), from the experimental field Gorni Lozen under grassland and of Haplic Cambisol (loam textural class), from the experimental station of potatoes Samokov, cultivated land. The concentrations of the additives were 10% by mass of the sample. The amount of main groups of soil microorganisms was determined - ammonifying and cellulolytic microorganisms, mineral nitrogen-utilizing bacteria, actinomycetes and microscopic fungi. The changes of water retention properties of the studied mixtures were analyzed. It was found that the distribution of soil microorganisms was influenced in a different way by the applied additives in the studied soils.

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