Modern changes in the reclamation state of irrigated lands of the Altai Territory

Abstract

Irrigation of land over time leads to the development of such negative processes as salinization and waterlogging of land, a decrease in soil fertility, a change in the chemical composition of groundwater, soil erosion. The reclamation state of irrigated land is a complex qualitative indicator that assesses the impact of natural and technological factors and characterizes the state of the system «Soils - Soils of the aeration zone - Groundwater». The categories of land reclamation state adopted in Russia and a number of post-Soviet countries determine their suitability for agricultural use and the focus of measures to preserve potential soil fertility. On the example of the Altai Territory, an analysis of the dynamics of a number of indicators characterizing the reclamation state of land is carried out: the depth of the groundwater level; mineralization of groundwater; mineralization of irrigation water; the degree of soil salinization in the root layer; the degree of salinity of the soil, as well as the possible causes of the development of negative processes. Using the methods of mathematical statistics, the rates of development of processes on irrigated lands and trends in increasing / decreasing the area of irrigated agricultural land, on which changes in each of these indicators are recorded, are estimated