The solubilization of lignite by selective strains of bacteria

Abstract

The world demand for restoring technologies of anthropogenically disturbed soil fertility and increasing crop yields emerges primarily from the active transition to a new paradigm in the field of agro-technologies. In this regard, many countries of the world are potential markets for new technologies of humus
production and creation of eco-black-earths (chernozems). For the production of humus, it is intended
to use lignite (brown coal) as the raw material, which is rich in humic acids. By familiarizing ourselves
with the coal nature, we selected lignite (oxidized) samples for further experiments. Based on the understanding of coal and microorganisms, we selected lignite which are from different areas of Kazakhstan
coal-mines, and different types of bacteria. FTIR was used to analyze the content of humic substances
treated by different bacteria. A bacterial strain RBK 7 was used to decompose a coal sample, as a result,
the humic acid was extracted and applied to the planting process of coriander, and it was found that a
certain concentration of humic acid could improve soil fertility and the germination rate of this plant.
Key words: lignite, bacteria, humic acid, FTIR.