Different anthropogenic influences as well as soil mechanical and chemical properties have a significant influence of presence of functional groups of microorganisms and on enzymatic activities in the plough-layer. The contemporary approach focusing on sustainability, biological diversity and conservation of soils as an unique resource, relies on the investigations that can contribute to the knowledge of microorganisms and enzymes responsible for all the major biochemical processes in soil. As soil quality is also reduced by erosion, contamination and loss of soil organic matter, modern agricultural production is no more focused on high yields and high inputs but requires agronomists to apply new findings to knowingly contribute to controlled production of all crops used for human nutrition. The principal aim of our investigations was to study the microbiological activities in luvic soils of western Slavonia, involving determination of the total number of microorganisms and functional groups of aerobic and anaerobic asymbiotic N fixators, cellulolytic bacteria and fungi as well as nitrificators. Proteolytic and cellulolytic enzymatic activities were also determined. The paper presents analysis of 10 soil profiles, in which different responses were recorded of the environment and organic matter contents, affecting the microbiological activities in luvic soils of western Slavonia. According the research results, the average total number of microorganisms was 21.33 x 10^6 CFU/g soil.Regarding the functional groups, a very good proportion of aerobic asymbiotic N fixators and cellulolytic fungi was determined. Rsearch results for cellulolytic activities in luvic soils show that higher values were determined for endogluconase (0.44 mg red glucose/g soil) than for cellobiohydrolase (0.26 mg red glucose/g soil).

Poljoprivreda