Effects of Bioactive Compounds on the General and Active Symbiotic Potential and Biological Nitrogen Fixation of <i>Phaseolus vulgaris</i> L. Varieties

This article discusses the effects of seed treatment with bioactive substances on the symbiotic activity of plants during growth and development through foliar feeding in the Samarkand region of the Republic of Uzbekistan, when growing the “Ravot” and “Makhsuldor” varieties of beans. The variants in which bioactive substances were applied to seeds and leaves showed an increase in the potential for general and active symbiosis, and the superiority of the Mahsuldor variety over the Ravot variety. The increase in the total and active symbiotic potential in biological nitrogen fixation under the influence of the drugs used in both varieties. It is stated that the Gumel Lyuks preparation is superior to other preparations in terms of its effect, and that the active symbiosis potential lasts for 1 - 5 days. Bioactive preparations are used to ac-tivate the nitrogenase enzyme, to increase the concentration of leghemoglobin in the nodules, and increase biological nitrogen fixation. The biological nitrogen content in bean varieties ranged from 39.34 to 54.03 kg, which led to the activation of the nitrogenase enzyme under the influence of the drugs used and an increase in the amount of biological nitrogen fixation. The leghemoglobin content was 2.86 - 3.65 mg/g, the fixed biological nitrogen content was 39.34 - 45.87 kg/ha in the Ravot variety variants, and 50.24 - 54.03 kg/ha in the Mahsuldor variety.