Valetska O. Influence of fermented organic fertilizers on elements of fertility sod-weakly podzolic soil and productivity level of crop rotation

Object - changes in the nutrient status of sod low-podzolic consolidated sandy soil and crop productivity when using fermented organic fertilizer in the crop rotation link. Purpose - to establish the effect of organic fermented fertilizers on the elements of sod low-podzolic soil fertility through the development of an optimal system of fertilization to improve the qualitative and quantitative indicators of the crop rotation link potato - oat - lupine for herbage in the Ukrainian Western Polissya. Methods - field, analytical, laboratory and field, computational and comparative, mathematical statistics. Theoretical results - determined the regularities of changes of nutrient regime of sod-weakly podzolic sandy soil, manifested in the growth of the content of nitrate and ammonium nitrogen, mobile phosphorus and potassium compounds under the influence of organic fermented fertilizers made with mud ponds and chicken manure. It was proved that application of increased rates of organic fermented fertilizers significantly affects the state of microbiocenosis of sod low-podzolic consolidated sandy soil by increasing the number of agronomically beneficial groups of microorganisms. The stabilizing role of moderate application rates of organic fermented fertilizers on humus content was established; the tendency for humus accumulation was observed at increased application rates. Practical results - it is proved that traditional organic fertilizers can be replaced with fermented ones without reducing the biological productivity of sod low-podzolic sandy soil in the crop rotation link. An effective system of crop fertilization in the crop rotation link potato - oat - yellow lupine was developed using fermented organic fertilizers. This system provides increased crop yields, improves produce quality indicators as well as microbiological and agrochemical indicators of sod low-podzolic consolidated sandy soil. The economic and energy viability of their use in the Ukrainian Western Polissya is substantiated. Novelty - the prospects of bringing pond sludge and chicken manure into fermentation process to produce organic fertilizers have been proved; the peculiarities of sod low-podzolic soil fertility elements dynamics as influenced by fermented organic fertilizers have been determined; the correlation between organic fermented fertilizers rates and main nutrients labile compounds content in the soil has been established; the optimum fertilization system involving organic fermented fertilizers has been developed in order to increase yield in the crop rotation link potato - oat - lupine for herbage in the Ukrainian Western Polissya. Degree of application - the main results of studies were implemented in the process of potato cultivation in Kremenets Agricultural Production Cooperative, Rozhyshche district, on the area of 5 hectares and Nadia Agricultural Private Company, Ratne district, Volyn region, on the area of 4 hectares. Certain dissertation provisions are included in the scientific and practical recommendations entitled "Production of organic fermented fertilizers and their use in growing crops". The field is agriculture.