DEVELOPMENT OF DRIP IRRIGATION SYSTEMS IN CULTIVATION OF COTTON VARIETIES IN AUTOMORPH GRAY SOIL CONDITIONS

Abstract

  The article presents the results of research conducted on the study of the processes that occurred in the water-physical parameters of the stands during the maintenance of cotton varieties under different irrigation technologies in the conditions of automorphic gray soils of the Tashkent region. In this, 3 (S-6524 and new S-6570 and S-8298) varieties of cotton were studied under irrigation and drip irrigation (TS). In the experiment, irrigations were carried out in different order (65-70-65 in TS, and 70-70-60 percent in control watered with 70-75-65) depending on the limited field moisture capacity (field wet capacity) of the soil. As a result of scientific research, in drip irrigation medium fiber cotton varieties S-6524, S-6570 and S-8298 compared to field wet capacity at 70-70-60% and 70-75-65% pre-irrigation soil moisture when irrigated 12-13-14 times S- 6.2-5.1-8.8 cotton yield was obtained in 6524 cotton variety, 42.5 s/ha in S-6570 cotton variety, and 46.2 s/ha in S-8298 cotton variety, compared to 6.2-5.1-8.8 s/ additional harvest was achieved.