Assessment of the sorption properties of loess rocks in reducing the ecological risks of irrigated areas

Annotation A method has been developed to reduce the pollution of groundwater in irrigated areas by nitrogen compounds. The introduction of a new organic-mineral fertilizer Organic mineral fertilizer increases the humus content in the soil, the sorption properties of the loess rocks of the aeration zone. Due to this, the barrier role of the aeration zone, a part of mineral fertilizers, their derivatives (NPK, nitrates, nitrites, ammonium) and pesticides (halogen organic pesticides and their metabolites) is adsorbed and processed into harmless forms. Thesis Organic mineral fertilizer is a new organo-mineral fertilizer from coal waste with high carbon content inoculated with two microorganism associations in a mixture with bentonite. The method of its production is protected by the patent of the author of the article. When applying the Organic mineral fertilizer in the norms of 10 and 15 t / ha, the content of ammonium in 0-25 cm of the soil of the lysimeters was 11.0 and 12.4 mg / kg, respectively, against 6.5 mg / kg in the control. When applying only mineral fertilizers (control), the content of nitrates in the 0- 25 cm soil layer reached 15.6 mg / kg, and the application options for the Organic mineral fertilizer in the norms of 5, 10 and 15 mg / kg were 10.9, 9.4 and 8.4 mg / kg, which is significantly lower than in control. [(1),(3),,(7)-(9),(11)]