INFLUENCE OF GROWTH-REGULATING PRODUCTS ON PRODUCTIVITY OF SPRING BARLEY

The vector of biologization in agriculture of the Russian Federation and its focus on organic agriculture emphasize the relevance of the conducted research. It reflects the results of the experiment in 2016-2020 and the results of 2021 of the effect of growth-regulating products on the elements of spring barley crop structure on common black soil in the conditions of Rostov region. The studied products are: Biodux; Trainer; Artafit; Obereg; Fulvohumate. The control is water treatment. Barley agrocenoses were sprayed according to the recommendations: 1st - in the tillering phase, 2nd - in the heading phase. The barley forecrop is sunflower. The area of the experimental plot is 600 m2. The placement of variants is sequential on 25 m2 in a 4-fold repetition. As for Leon variety, it was found that barley field germination in field conditions was 88%. Double treatment of the agrocenoses with growth-regulating product contributed to better plant survival by harvesting time (more than 80%), in particular, with Biodux and Obereg (86 and 87%, respectively). Formation and growth of productive stems up to 1.28-1.33 was observed after the first spraying in the tillering phase. The second spraying in the stalk-shooting phase contributed to formation of heavy grain, Obereg impact was especially outstanding, where the mass of a thousand of grains exceeded the control by 2.9 g. The application of growth-regulating biological products increased the number of grains per head (on average, 1 pc more than in the control). It can be concluded that there is yield increase under the influence of growth-regulating products due to all elements of barley productivity, especially under the influence of Obereg and Biodux.