Assessing the suitability of drainage water for irrigation in view of soil-meliorative conditions

The purpose of the work was to assess the suitability of drainage and discharge waters for irrigation, taking into account soil-reclamation conditions. Assessment of the suitability of drainage water for irrigation of agricultural land is carried out taking into account the indicators characterizing the properties of soils and substances entering the soil during agricultural production — nitrogen, potassium, phosphorus, calcium, magnesium, chlorides and sulfates. The study of the chemical composition of drainage outflow was carried out on the territory of Semikarakorskii district of Rostov region near Anastasiadis farm. Within the boundaries of the study area is implemented vegetable crop rotation: onion — medium cabbage — potatoes — late cabbage. In 2017, the onion was grown on the territory of the plot. To predict the degree of pollution of drainage and discharge waters it is necessary to study the dynamics of mineralization and composition of soil solutions and soil absorbing complex, the mechanism of fertilizer removal. Calculations showed that the concentration of biogenic elements, for example, nitrogen, in drainage and discharge waters depends on the doses of fertilizers, the degree of digestibility of their soil and soil-meliorative conditions of the site