An Immobilized Microorganism-Based Biopreparation as a Major Component for New Generation High-Efficiency Organic Fertilizers

Abstract Two biopreparations based on the bacteria Bacillus megaterium and Azotobacter chroococcum immobilized in modified polyvinyl alcohol hydrogel have been created. It has been shown that after application of the constructed biopreparations, an increase in soil moisture content (by a factor of two), germination (by up 100%), the length of the cress stem and roots (15–30%) was achieved. The addition of an Azotobacter chroococcum-based biopreparation led to a 2-times increase of nitrogen in the soil. The survival period for bacteria immobilized in a hydrogel based on polyvinyl alcohol modified with succinic acid was longer than 30 days. It is concluded that the studied biopreparations exhibited high potential as a major material for an efficient biofertilizer of a new generation.