COMPLEX ORGANO-MINERAL FERTILIZERS BASED ON SEWAGE SLUDGE WITH MINERAL ADDITIVES AND THEIR EFFECTIVENESS IN GROWING CORN FOR SILAGE IN THE FODDER CROP ROTATION CHAIN IN THE NORTHERN FOREST-STEPPE OF UKRAINE

It was determined that the sewage sludges of the sewage treatment facilities of a million-plus city and the industrial center in the north of Ukraine, after the final aging on sludge sites, according to agroecological indicators, are suitable for their use as a local organic raw material to produce innovative types of complex organo-mineral fertilizers. The composition of complex organo-mineral fertilizers based on sewage sludge with mineral additives of various origins was developed and new types of organo-mineral fertilizers of prolonged action for multi-purpose use were obtained. When studying the effectiveness of new types of organo-mineral fertilizers in a field experiment, it was established that on gray forest soil under the conditions of the northern Forest-Steppe of Ukraine, fertilizers of the first type were not inferior to traditional and non-traditional organic fertilizers in terms of effectiveness in the year of direct action when the main application was made in optimal doses under corn for silage and complete mineral fertilizer in equivalent doses. New organo-mineral fertilizers of the second type were not inferior to organic fertilizers in terms of direct-action efficiency.