ROLE OF BIOLOGICALLY ACTIVE SUBSTANCES IN INCREASING RESISTANCE OF SOYBEAN PLANTS TO UNFAVORABLE ENVIRONMENTAL CONDITIONS

Abstract

The article presents the research results of the influence of biologically active substances and the herbicide Pulsar (active ingredient - imazamox) on the enzymatic activity in leaves, biological productivity and seed quality of the mid-ripening soybean variety Kitrossa. Field experiments were conducted on meadow chernozem soils of the All-Russian Scientific Research Institute of Soybean in 2017-2018 years. The natural preparations were used as biologically active substances: ExtraKor - obtained by processing Dahurian larch and Betulin - birch bark extract. As a result of the conducted research, it was found that the annual application of the herbicide Pulsar in the phase of the 3rd ternate leaf led to a decrease in the specific activity of the peroxidase enzyme compared to the control. The treatment of seeds and vegetative plants of the soybean variety Kitrossa with Betulin and ExtraKor preparations contributed to an increase in the specific activity of the being studied enzyme in the leaves that indicates the stimulation of biochemical processes and the ability to increase adaptive potential. Thus, it was revealed that the combined use of biologically active substances led to a decrease in adverse environmental factors and the mobilization of protective mechanisms of plants that ensured a decrease in the negative influence of the herbicide on soybean plants. As a result, on the average for 2 years of research, the biological productivity of seeds increased to 3,08 t/ha. The germination energy from the application of biologically active substances increased on the average by 5%.