The Effect of Potassium Humate on the Morphophysiological Indicators and Yield of Soybean Growing in Different Ecological Conditions of Azerbaijan

Abstract In the research, an attempt was made to theoretically substantiate the use of potassium humate (k-humate) preparation in improving the morphophysiological indicators and productivity of soybean plants of the “Bravo” variety infected with rhizotorphine, which is prepared based on the root nodule bacterium Bradyrhizibium japonicum (strains 634), in two different ecologically distinct regions (Kurdamir and Ganja) of the Republic of Azerbaijan. The role of rhizotorphin and potassium humate in changing the values of some morphological and physiological parameters of soybean plants was determined and the response of soybean plants to these factors was studied. The dynamics of nitrogen fixation activity and total nitrogen accumulation in soybean plants were studied. The results obtained indicate that k-humate increases the tolerance of soybean plants to environmental stress factors by improving their metabolic processes under unfavorable conditions. In both regions, k-humate plays a positive role in improving morphological parameters, forming the photosynthetic apparatus and symbiotic system, accumulating dry matter and total nitrogen, and also increasing productivity. The k-humate preparation works more effectively in Kurdamir, where soil and climatic conditions are more stressful than in Ganja.