Agroecological Assessment of Drainage-Waste Swamp Waters on Old-Arable Lowland Peat and Depleted Soils of the North-East of the European Part of Russia

The main feature of peat and depleted soils that have been in culture for a long time is a high degree of physico-chemical and biological transformation of the organic matter of the peat deposit and the underlying strata. According to the content of many ash elements in wastewater, it is possible to judge with a high degree of probability the amount of losses of these elements from the soil solution and the soil adsorption complex as a whole. Information on the hydrochemical regime of drainage waters of each personal section of the drained peat deposit can serve as a reliable and operational tool for general control over the regime of use of organogenic soil in agricultural and forestry production. This paper presents the results of the ecological assessment of drainage-waste waters from the drained peat bog «Gadovskoe», used in agricultural and forest crops for more than 100 years, are presented. It has been established that the hydrochemical situation is most closely related to the hydrothermal regime, the nature and duration of stay of various peat mass objects in production. With an increase in the service life of peat and developed soils, the degree of mineralization of drains increases. The total amount than 90 years reaches 620 mg/l, the minimum content of most ash elements in the waters was noted at a site not used in production sphere (310 mg/l). On average, for all peat bog objects, their highest losses in drainage waters occur in the late autumn period, the minimum - in the spring. According to the combination of dominant ions, the drainage-waste waters of the peat bog belong to a calcium hydrocarbonate type of water.