The influence of the waste water sediments on soils' agrochemical indicators

The chemical composition of waste water sediments depending on arriving on treatment facilities industrial and municipal drains, and also definition methods varies rather widely. Waste water sediments are characterized by a wide set of macro - and microelements, including heavy metals. Waste water sediments contain 1,0-1,34% of the general nitrogen, 0,21-0,23% of the general phosphorus, 0,32-0,36% of the general potassium at рН - 4,8-5,0. The purpose of work was to establish influence of shorts production in the form of waste water sediments on environment and agro ecological indicators of the soil. The stocks of nutrients in the soil, their distribution on a profile, spatiotemporal variation in the soil and availability to plants were considered in the course of undertaken studies. Indicators: soil acidity, the adopted forms of nitrogen, phosphorus, potassium, microelements, environment reaction, the maintenance of the absorbed bases and humus. Thus, in the conditions of studied object the overlapping of fertile layer of waste water sediments leads to accumulation of nitrates in the top soil and, finally, in crop production. The decrease in the maintenance of a humus for 31,1%, mobile forms of phosphorus for 14,3% potassium for 26,1% is revealed and soil acidity increases by 2,9% in comparison with control in the area of overlapping of a fertile layer of the waste waters sediments. The waste waters sediments storage on a studied area led to sharp accumulation in the soil of nitrates, with maximum concentration limit excess to 218,0%, at an average value for 244,5%.