Phytomelioration of secondary saline irrigated lands of the southeast of Kazakhstan

Abstract

The article describes phytomeliorative methods for increasing the productivity of saline irrigated lands by sowing phytomeliorants and treating seeds and spraying the above-ground part of crops with PA-2,1 (adaptogen) preparation. The results of observations of the growth and development of phytoemeliorants showed that phytoemeliorants intensively grew, developed and accumulated aboveground masses, especially on variants treated with adaptogen. The intensive growth and development of phytomeliorants contributed, at the end of the growing season, to a decrease in the salt content in the soil and an increase in the yield of soybeans, sorghum, and Sudan grass. The conducted economic calculations to determine the effectiveness of cultivation of phytomeliorants on degraded irrigated lands showed that cultivation of phytomeliorants on saline soils, along with a decrease in the content of salts in the soil, makes it possible to obtain net incomes with high profitability. The article presents the results of field research on the cultivation of basic and intermediate crops and the economic justification for obtaining two crops per year.