Immobilized Microorganisms-based Biopreparation as a Major Component for New Generation High-effeciency Organic Fertilizers

Abstract

Two biopreparations made of 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 Azotobacter chroococcum-based biopreparation led to a 2-time increase of nitrogen in soil. The survival period for bacteria immobilized in hydrogel based on polyvinyl alcohol modified with succinic acid was longer than 30 days. It is concluded that the studied biopreparationsexhibited high potential as a major material for efficient biofertilizer of new generation.