RECONCILIATION OF HIGH EFFECTIVE HUMAT-CONTAINING ORGANO-MINERAL FERTILIZERS

Abstract

One of the most effective ways to increase the yield and quality of crops, strengthen plant immunity to adverse environmental factors and restore soil fertility is the use of humate-containing organo-mineral fertilizers. The purpose of the work is to obtain highly effective humate-containing organo-mineral fertilizers by the interaction of phosphorite and sodium humate in acidic environments. To study the composition and properties of the obtained product, methods of chemical and physicochemical analysis were used: infrared spectroscopy, X-ray phase analysis, and scanning electron microscopy. The influence of the norm of a mixture of acids (80-110% by stoichiometry) and the amount of sodium humate (100-150 g), temperature (20-60°C) on the interaction process in a complex heterogeneous system "phosphorite - a mixture of phosphoric and nitric acids - sodium humate" was studied. The optimal conditions for obtaining humate-containing organo-mineral fertilizers were determined: the norm of the mixture of acids from stoichiometry is 90%, the amount of sodium humate is 130 g, the temperature is 60 ° C. The results of the experiments showed that when phosphorite and sodium humate interact with a mixture of mineral acids, humates, dihydrophosphates and calcium nitrates It has been established that the addition of sodium humate to the process of decomposition of phosphorite with a mixture of phosphoric and nitric acids inhibits the retrogradation of P₂O₅, increases the coefficients of water-soluble and assimilable forms of phosphorus, reduces the amount of acidic reagent by 10% of the stoichiometry and neutralizes the free acidity of suspensions. On the basis of the conducted studies, humate-containing organo-mineral fertilizers were obtained, containing I eat digestible forms of phosphorus Kusv.> 90% and more than 68% of nutrients.