INFLUENCE OF HERBICIDES ON WEEDINESS AND SEED PRODUCTIVITY OF SOYBEAN IN THE CONDITIONS OF THE OUTER MANCHURIA

Abstract

The main agricultural crop in the Amur region is soybean. Soybean is an
unpretentious crop, but it competes rather weakly with weeds during the growing season, especially at the beginning of its growth, which is one of the main reasons for the decrease in
crop yield. The relationship between crops and weeds changes in a positive way when a person influences on agrophytocenosis, which has a significant impact on soybean productivity.
Now almost the entire area, which is occupied by soybean, is treated with weed control preparations, but each herbicide in different soil and climatic conditions has a different effect on
both weeds and crops. In this regard, the purpose of our research was to study the effect of
herbicides of different chemical classes on weeds and soybean seed productivity. The studies
were carried out on the experimental field of the FSBSI Federal Research Center “AllRussian Research Institute of Soybean” in rural locality Sadovoye, Tambovsky District, Amur
Region. The highest efficiency in weed control among all the studied herbicides was found in
soil-applied herbicide Fronter at a dose of 1.2 l/ha, both together with Bazagran at a dose of
2.0 l/ha on vegetation, and in its single use – the number of weeds decreased by 51.8 and
51.5%, and their weight by 48.1 and 49.7%, relative to the control. The introduction of herbicides in soybean crops not only contributed to the reduction of weediness, but also provided a
significant increase in yield, in comparison to the control (without herbicide application). The
greatest increase in soybean yield was obtained in the variant with Fronter + Bazagran herbicide application and amounted to 99.5%, which also indicates the expediency of their use.