Abstract

Soil chemical, biological and physical properties play important role in soil quality and are related with increasing OM, plant nutrient content and availability, soil microbiologcal activity. New generation of soil amendments with specific soil microorganizms are great interest worldwide. Field experiments were carried out in 2018-2019 in Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry. The aim was to determine the effect of bio-products with Trichoderma reesei, Acinetobacter calcoaceticus and Bacillus megaterium on soil SOC, soil respiration and microbial biodiversity on loamy Cambisol. Under dry meteorological conditions, bio-products with Trichoderma reesei, Acinetobacter calcoaceticus and Bacillus megaterium caused increase in SOC content, C/N ratio, Humic/Fulvic acids ratio, increased soil respiration and microbial biodiversity. We concluded that use of mixture of three products: Trichoderma reesei + Acinetobacter calcoaceticus + Bacillus megaterium are the most promising bio-amendment under changing climate conditions.

Keywords: Soil organic carbon; PGPR; PGPF; AWCD

Abbreviations: SOC: Soil Organic Carbon; PGPR: Plant Growth-Promoting Rhizobacteria; PGPF: Plant Growth-Promoting Fungi; AWCD: Average Well Colour Development; R - Richness