The reaction of soybean and pea crops in the Priobye region to a humic antistress agent to herbicides in the foreststeppe of Western Siberia

Abstract

In the article, the authors presented those enticing actual herbicidal treatments (the active ingredient is cloquintocet-mexyl, fenoxaprop-P-ethyl), spring-summer and summer droughts, are stress factors for the development of early-ripening soybean varieties and zoned pea varieties in the forest-steppe of the Priobye region. They limit the realization of the biological yield potential of soybeans and reduce the coarseness of pea grains and their total protein. Use with the herbicide of humic preparation from leonardite Cytogumat at a rate of 0.4 l/ha relieves physiological stress on soybean plants, providing a rapid increase in biomass and grain yield of 4.2-5.5 c/ ha, or 19%. Furthermore, the humic product in a single year can increase the duration of soybean vegetation by 3-4 days and the height of lower bean attachment by 24%. The authors analyze the stress resistance to the anti-cereal herbicide of 5 varieties of peas. They also found that the varieties Altaysky Usatiy and Novosibirets mediumresistant, Yamal, and Astronaut are sensitive to the herbicide. The application of Cytogumat in susceptible varieties increased green mass by 30.1% and 24.0%, grain yield by 10.5-12.0%, weight of 1000 grains by 7.1-7.4%, and total protein. In moderately resistant varieties, the reaction to Cytogumat was less pronounced and was accompanied by an increase in yield by 8–10%, grain size by 5–5.4%, and protein content by 1.9%. The Yamalsky pea variety in the Ob River region proved to be tolerant to stress, and it is inexpedient to use Cytogumat on it.