The treatment of winter wheat, grown on ordinary carbonate chernozem with humic fertilizer "BIO-Don"
The results of the winter wheat treatment with BIO-Don humic fertilizer, obtained by extraction from the products of earthworm manure are discussed. Field experiments were carried out on ordinary chernozem carbonate. The presence of beneficial microorganisms strains in the humic fertilizer has been shown. Preplant treatment of soil with biological product BIO-Don and double treatment of wheat crops (in the phase of tillering and booting) resulted in stimulation of soil microflora population, which reached more than 150% for soil fungi and cellulose decomposing actinomycetes. The content of mobile phosphorus in the variants with BIO-Don throughout the growing season was significantly higher than in the variant with mineral fertilizers (background). Given the shortage of phosphorus, characteristic of carbonate chernozem, it was one of the factors that optimized the plant nutrition. The increase of the yield of winter wheat upon the usage of BIO-Don fertilizer in the production experiment ranged from 6.9 to 12.8 t/ha, which is up to 35% compared to the background. The positive effect of biological preparation for winter wheat on ordinary carbonate chernozem is due to its stimulating action on soil biological activity, as well as a positive influence on the content of available phosphorus and the soil structural state.