Shkvyr T. Agrochemical estimation of fertilizers application and bacterial preparation diazofit at spring wheat growing on meadow-chornozemic soil of the Right-bank Forest-steppe of Ukraine

The results of research showed that mineral fertilizers application improved nutrient regime of soil and enhanced it's fertility by increasing mineral nitrogen, mobile phosphorus and potassium content in topsoil and subsoil layers. Soil nutrient regime improvement promoted better wheat spring plant development on the fertilized plots with increasing of dry matter yield, leaf area, net photosynthesis production and nutrient utility. Wheat spring seed treatment with diazofit increased effectiveness of fertilization in crop rotation and led to additional grain yield. The foliar dressing with complex fertilizers intermag-zernovy and nutribor with taking into account the organogenesis stages could be a way of increasing the basic fertilization efficiency and promotes additional 4,9-5,0 t/ha of 1st grain class. Energy and economical estimation of long-term fertilizers application in crop-rotation and of their direct application, diazofit application, and intermag-zernovy and nutribor wheat spring cultivation on meadow-chernozemic calcareous soil has been determined.