Features of changes in the reclamative state and soil fertility by regular irrigation and in the post-reclamation period of the southern Russian lands

Purpose: to reveal the features of changes in reclamative state and soil fertility lands southern Russia by regular irrigation post-reclamation period. Discussion. The reasons for raising water table (GWL) are considered: location systems floodplains rivers or on terraces I II, design large plots with an area about 1000 hectares systems, construction canals network earthen channel etc. main factors influencing deterioration decrease irrigated land (secondary salinization, alkalinization, waterlogging, overconsolidation, dehumification, etc.) natural technogenic factors. Natural ones climate, geological structure, geomorphological conditions, relief, drainage lands, geochemical hy-drogeological types properties soils (filtration, etc.), their salinity alkalinity, fertility, Technogenic efficiency supply, methods technique, regime, map planning, parameters quality surface waters used irrigation, technical level operation systems. Conclusions. load period, presence artificial contributed a partially secondary while do not reach background levels general. During reconstruction new complexity sequence measures taken prevent increase GWL, salinization alkalinization should be observed.