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By Gabi-Mirela Matei, S. Matei, Iuliana Gabriela Breaban and Radu Lacatusu


Favorability for microbial life of litic and mixic regosols from different urban areas in Iassy municipium was assessed using methods for monitoring the level of soil respiration, microbial density of bacterial and fungal microflora as well as taxonomic composition and species frequency. All soils presented urbic horinzons (U), destroyed structure and carbonates of anthropogenic origin even in topsoil layer. In conditions of neutral-alkaline reaction of urban soil, a moderate content of humus, good conditions for organic matter mineralization processes, rich supply with total nitrogen and mobile phosphorus and potassium and levels of loading with heavy metals below maximum allowable limits, microbial activity was moderate with an average value of 46,443 mg CO2x100g-1 soil. Bacterial community has moderate to high numbers of representatives, dominated by Bacillaceae and Pseudomonadaceae. Fungal microflora is moderately developed and strongly dependent on local soil conditions from the point of view of species composition, with a slight dominance of cosmopolitan Fusarium species. In highly anthropic disturbed soils microbial numbers and activity arelower than in soils less affected by urbanization

Topics: urban soils, microbial community, soil respiration, bacteria, fungi, Agriculture (General), S1-972, Agriculture, S, DOAJ:Agriculture (General), DOAJ:Agriculture and Food Sciences, Science, Q, Geology, QE1-996.5
Publisher: Alexandru Ioan Cuza University of Iasi
Year: 2006
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