INFLUENCE OF THE APPLICATION OF STIMULANTS TO SOYBEANS SOWN IN FIELDS FREED FROM WINTER WHEAT ON SEEDLING EMERGENCE AND GRAIN YIELD

In the context of global climate change, drought, and extreme weather conditions,the effectiveness of applying stimulants to soybean crops after winter wheat has been determined for theeffective use of land, growing two harvests per year,meeting the population's demand for food products and livestock for feed,preserving and increasing soil fertility.The most favorable temperature for intensive growth and development of soybeans is around 20-250C,however, it can grow well even in the temperature range of 25-300C.In the experimental area, the average air temperature in July was 31.2-33.3 0C,the highest air temperature was 42.2-44.80C,at such a high temperature, the soybean plantis under stress and the possibilities of growing a high yield arelimited. To ensure the intensive growth and development of soybeans and obtain high yields, the use of Uzgumi and Ma'suda stimulants in various doses before sowing seeds and during the growing season was studied.When treating soybean seeds sown repeatedly after winter wheat with the Uzgumi stimulant at a rate of 0.6l/t-1and the Ma'suda stimulant at a rate of 3.0l/t-1, itaccelerated by 4.9-6.8%, and germination was observed 1-2 days earlier.When Uzgumi was applied to soybean seeds at a rate of 0.6l/t-1, at 3-5 leaves at a rate of 0.2l/ha-1, at budding at a rate of 0.3l/ha-1and at flowering at a rate of 0.4 l/ha-1, the plant height increased by 2.5sm, the number of pods increased by 2.5 pieces, when Ma'suda stimulant was applied to soybean seeds at a rate of 3.0l/t-1,at 3-5 leaves at a rate of 6.0l/ha-1and at budding at a rate of 9.0l/ha-1, the plantheight increased by 1.5sm, the number of pods increased by 2.2 pieces.When treating repeated soybean crops with Uzgumi and Ma'suda, the dry mass increased by 1.79-2.93 g and more biomass accumulated. When using the stimulants Uzgumi and Ma'suda, the grain yield of soybeans was 2.02-2.11t/ha-1, andthe grain yield increased by0.31-0.40t/ha-1.