Desalinization of degraded soils by atmospheric precipitation and Biosolvent for saving water resources

Abstract

In the Syrdarya region of Uzbekistan, the influence of atmospheric precipitation on changes in the degree of salinity and chemical composition of the upper 30 cm soil layer was studied. Experiment options: 1 - loosening the soil to a depth of 70 cm, 2 - loosening, followed by soil treatment with preparation containing polymaleic acid. A decrease in the degree of soil salinity by 7 - 8 dS/m has been established with the help of only 302 mm of precipitation, without water wasted for leaching. The decrease in soil salinity was: according to EU, 56% - in option 2, and 52% - in option 1. According to TDS, the salinity reduction was: - 61 and 52%, according to SO “4. - 58 and 47%. The content of calcium in the variant with the use of Biosolvent decreased by 48%, and in the control variant, it increased by 15%. It has been estimated that with a decrease in salinity from 16 to 8 dS/m, a possible increase in the yield of a salt-tolerant barley crop by 1.6 t/ha is possible. Taking into account the costs of loosening and tillage with the preparation, the net income of the farmer can be $480/ha.