Artemyeva K. Efficiency of new complex organo-mineral fertilizers on chernozem is typical in the conditions of the Left Bank Forest-Steppe of Ukraine

Object – the regularities of changes of fertility indicators of chernozem typical, yield and quality of spring barley under the effect of application of complex organo-mineral fertilizers. Purpose – to establish the efficiency of new complex organo-mineral fertilizers in the fertilizer system of spring barley, to justify the expediency of their application on chernozem typical for soil fertility reproduction and increasing of productivity of the culture. Methods – field, model-laboratory, laboratory-analytical, statistic. Theoretical results – theoretical approaches to production of new complex organo-mineral fertilizers on the basis of urea ammonium nitrate and potassium humate were developed; the regularities of the change of chernozems typical fertility indices, increasing of yield and improvement of quality of barley grain under the effect of fertilization by complex organo-mineral fertilizers at different doses, methods and terms of their application were established. Practical results – development of the composition and production of new complex organo-mineral fertilizers on the basis of urea ammonium nitrate and potassium humate which contributes to spring barley yield increasing, improvement of quality of grain and soil fertility. On the basis of researches, two patents for the utility model were obtained: «Method of production of liquid nitrogen-containing organo-mineral fertilizers» and «Method of production of biologically active fertilizer». The results are the part of recommendations «Agrotechnologies of production and application of new fertilizers». The technology of production and application of liquid nitrogen-containing organo-mineral fertilizers was developed and registered. Novelty − for the first time the expediency of enrichment of nitrogen fertilizers with humic preparations in order to obtain new complex organo-mineral fertilizers which are optimized for specific soil conditions and culture was scientifically proved. It was proved that addition of potassium humate to nitrogen fertilizers contributes to the formation of nitrogen-containing water-soluble complexes that leads to the stabilization of nitrogen and elimination of its losses during application of fertilizers. The system of fertilizer application for spring barley was improved with the establishment of effective economically profitable doses of complex organo-mineral fertilizers in case of application into a soil and during foliar feeding which provides improvement of agrochemical indicators of chernozem typical and promotes increasing of productivity and quality of the crop. The regularities of changes of fertility indicators of chernozem typical includes accumulation of mineral nitrogen and its hydrolysing forms while deficit-free balance of this element. Features of assimilation the main nutrients by spring barley, their removal by harvest and the nitrogen balance in the soil under the effect of application of complex organo-mineral fertilizers were determined. The degree of implementation - the production inspection and implementation of the main results of the dissertation was conducted in 2018 at the Dnipropetrovsk Chernivtsi, Ternopil and Lviv farms on the total square 1400 hectares. The field is agriculture.