PURCHASE AND RESEARCH OF UREA-BASED PHOSPHORUS-CONTAINING LIQUID - COMPLEX FERTILIZERS

Abstract

The urgency of the matter. In recent years, there has been a high demand for various types of complex NPK fertilizers in the world mineral fertilizer market. This situation is primarily related to their high agrochemical value, because such fertilizers allow to introduce all three most important nutrients into the soil at the same time - nitrogen, phosphorus and potassium.Plant growth, development and high yields are directly related to their nutrition. Fertilizers have a great role in providing plants with nutrients. They are important in increasing soil fertility, increasing the productivity of agricultural plants and improving the quality of the obtained product. As we know, fertilizers with nutrient elements should be applied separately to the soil¬¬copper has a number of disadvantages. All mineral fertilizers contain several chemical elements, some of which can harm plants. So, e.g. in the production of phosphorous fertilizers, CaSO4 obtained as a result of processing phosphates with sulfuric acid is introduced into the soil as a ballast. Also, a certain amount of fluorine is transferred to the soil with superphosphate. During the processing of phosphates with nitric acid, the active hydrogen ion is used to split the phosphates, while the anions remain as the desired nitrogen component in the finished product. However, a slightly higher dose of nitrogen fertilizer can lead to a decrease in soil fertility and contamination of food products¬¬causes Thus, in the obtained product, nitrates increase, vitamin "C", sugar decreases, the plant develops unilaterally, which lowers its biological value. Ka¬¬lium fertilizers are also very necessary for plants. However, most potash fertilizers contain ballast elements (CI, Na). When high doses of systematic fertilization are carried out, they accumulate in the soil and reduce fertility, ultimately not improving the quality of either the plant or the soil. Other metals contained in it (Cd, Hg, Pb, Al) can accumulate in living organisms and cause various poisonings by entering groundwater. In this regard, also with macro and micronutrients¬¬¬¬ha highly concentrated and agrochemically more effective liquid complex fertilizer¬¬¬¬¬¬¬¬¬organization of the production of seeds, including NPK¬¬The production of complex fertilizers rich in trace elements is an actual problem of the modern era. The most interesting are concentrated NPK (nitrogen, phosphorus, potassium) liquid-complex fertilizers. Nitrogen-based fertilizers use ammonium nitrate and urea, the nitrogen content of which is 35.0% and 46.7%, respectively. In the first case, the product is called nitroammophos, in the second - carboammophos. Keywords: NPK fertilizers, plants, raw materials