Подходы к снижению негативных последствий использования слабо- и маломинерализованных вод в орошаемом земледелии

Abstract

Purpose: to identify the most suitable measures aimed at achieving the rational use of brackish and low-mineralized water resources for the Republic of Crimea, based on an analysis of foreign and domestic experience in ensuring the environmental safety of irrigation with limitedly suitable waters. Discussion: during the study, a review of foreign and domestic developments to reduce (prevent) the negative impact of irrigation with limitedly suitable water resources on soil and crops and an analysis of approaches, implemented in the Crimean region, aimed at ensuring environmental safety of using brackish and low-mineralized waters in irrigated agriculture was carried out. It has been found that the main technological solutions aimed at reducing the negative impact of using limitedly suitable water in agriculture include: determining the maximum permissible mineralization of irrigation water from an ecological and economic point of view, reducing irrigation rates, selecting effective agronomic practices, justification the irrigation method and preliminary water treatment, carrying out washing with fresh water, forecasting and modeling of the water-salt regime. The first four approaches are mainly used in the Republic of Crimea. In general, their use makes it possible to prevent a significant decrease in crop yields and the intensive development of soil degradation processes. Conclusions: to ensure the environmental safety of irrigation with limitedly suitable waters, approaches that include the use of water resources with mineralization up to 3 g/l in combination with water-saving irrigation methods, reduction of irrigation rates and the application of chemical ameliorants, it is advisable to supplement with annual water quality and soil condition monitoring, as well as to provide for forecasting the salt regime of the fertile layer in the future.