Klymenko I. Influence of fertilizing system on crops productivity of the section of grain weeded crop rotation and fertility of dark-grey podzolized soil

The thesis shows the theoretical generalization and practical substantiation agrochemical and environmental efficiency of organic, mineral, organic and mineral fertilizer systems models in a section of grain weeded crop rotation with the determination of their ecotoxicological status in conditions of right-bank Forest-Steppe on dark-grey podzolized soil. It is fixed that the expanded reproduction of potential fertility of dark-grey podzolized soil and achieve highest indices productivity of crops the section of grain weeded crop rotation is provides at saturation of crop rotation with mineral fertilizers 211–316,5 kg/hectare of NPK against the background of burying by products of plant growing. Foliar dressing in crops soybean, oats, maize in the main phase of organogenesis universal complex fertilizers, which include magnesium, zinc, manganese, molybdenum, copper, iron, boron, against the background of the main organic-mineral fertilizer allows to increase productivity of oats by 7,2–8,5 %, maize by 7,1–8,6 %, soybean by 7,4–8,3 %. The calculation of the balance of nutrients and pollutants, indices of soil protective functions it has been found out that under grain weeded crop rotation in dark-grey podzolized soil under applying mineral fertilizers in dose of 18,5–316,5 kg/ha with ploughing crop by-products deficiency of copper and zinc microelements in soil becomes more profound and there is a danger of worsening ecotoxicological state of agroecotopes due to accumulation total and movable forms of lead and cadmium.