Modern salinity leaching technology of agricultural land reclamation (A case study from Bukhara region, Uzbekistan)

¹ National Research University of Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, 39, Kary Niyoziy ave., Tashkent, 100000, Uzbekistan
² Bukhara Institute of Natural Resources Management of the National Research University of Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, 32, Gazli shokh ave., Bukhara, 105009, Uzbekistan

^* Corresponding author: khamraev0045@gmail.com

Abstract

This article discusses the impact of the development of water-saving salinity leaching technology on the conditions of meadow-alluvial, moderately saline and medium sandy soils of Bukhara oasis according to its mechanical composition using Biosolvent compounds and the impact of the scientifically based irrigation regime on the reclamation regime of irrigated lands. In a saline-washed field with a Biosolvent combination, the Bukhara-102 variety of Gossypium received irrigation soil moisture at the beginning of vegetation when watered at 70-80-65 percent compared to LFMC, the amount of chlorine in the active (0-100 cm) layer of soil is 0,008%, the amount of sulfate is 0,036% and the amount of dry residue is 0,204% by the end of the growing season, these values are 0.020; 0.047 and 0.350%, with a seasonal salt accumulation coefficient of 2.37; 1.3; 1.72 respectively and compared to the control variant, it decreases by 0,50; 0,20; 0,13 and its yield is 40.5 cwt·ha^-1, with an additional 3.9 cwt·ha-1 of cotton yield compared to the control, which allows to save 53.7 cbm of river water used for growing 1 cwt cotton yield.