Results of Testing the Leaching Ability of the Biosolvent Preparation on Salted Soils of the Middle Current of the Syrdarya River
Annotatsiya
On the irrigated saline soils of the Syrdarya region of Uzbekistan, the leaching capacity of the Biosolvent desalination device has been studied. The experiments were carried out on bulk soil columns, as well as in the field: during the period of land leaching and irrigation of cotton. Field experiments and phenological observations of plants were carried out according to generally accepted methods. Soil analysis methods follow: texture, -by method of sedimentation; salinity -by measurement of electrical conductivity, in the soil-water suspension (1:1); ionic composition, -by method titration and gravimetric in a soil water extract 1:5. When leaching the soils on the columns with a 2% solution of the preparation, as well as when spraying the soil with a 10% solution of it, before pouring water, the leaching of HCO3Ca and Mg ions increases most of all. By field experiments on soil leaching, with preliminary treatment of the surface inside of the checks with the preparation in a ratio of 1:10, the efficiency of salt leaching increased by 35 ... 42%. This will save 2000 m3 / ha of water, with a drug consumption of 10 l/ha. Testing a preparation for treating the surface of furrows before watering cotton to reduce salt stress on plants showed an increase in salt leaching by 18-23%. As a result of improved conditions in the root zone of cotton, an increase in yield of 7.5 c / ha was obtained. The use of this preparat to reduce seasonal soil salinization in the fields is available to farmers.