Аннотация
The use of biopreparations based on soil microorganisms to improve soil fertility, crop productivity and reduce the spread of fungal diseases of grain crops is one of the promising and environmentally friendly directions. This, in turn, requires comprehensive work on the creation, evaluation and introduction of highly effective Kazakhstani biological preparations. The article presents data on the distribution of nitrogen-fixing bacteria and actinomycetes on different types of soils in Northern Kazakhstan, identified by sowing soil suspensions by serial dilutions. More than 100 new strains of nitrogen-fixing bacteria and actinomycetes were isolated on solid selective nutrient media. In order to create a biofertiliser, the pathogenicity and growth intensity of new nitrogen-fixing bacteria and actinomycetes were studied, and their cultural and morphological characteristics were described. The 30 most active strains such as №21S, №19S, №31S, №91S, №3S, №56S, №51S, №62S, №55S, №70S, №53S, №20S, №2S, №81S, №7S, №54S, №57S, №35S, №84S, №22S, №9S, №12S, №8S, №10S, №69S, №52S, №49S, №11S, №6S, №59S, which will be used to make biologics. In the future, these strains will be studied for their growth-stimulating, fungicidal properties, etc., and will also be used in the development of microbiological technology for the production of biological preparations based on nitrogen-fixing and actinomycetes capable of increasing productivity.