The mowing number effect on spring oats energy content and energy productivity in the Krasnoyarsk forest-steppe

The purpose of the study is to establish the influence of the method of use on the energy content and energy productivity of spring oat varieties. Objectives: to study the effect of the number of mowing on the energy content and dry matter collection; determine the dependence of energy productivity on the method of use, weather conditions and oat variety. The study was carried out in the forest-steppe zone of the Krasnoyarsk Region. Two cultivation methods were studied: single-cut (traditional technology with combine harvesting) and double-cut. The double-mowing method of use was carried out by mowing the green mass of oat varieties during the booting phase, and after their regrowth and the formation of a grain harvest, harvesting it. The yield of green mass was determined by a continuous method, by weighing the entire mass from the accounting area of the plot. Accounting, observations, and calculation of energy productivity were carried out according to the methodology of the All-Russian Research Institute of Feeds named after V.R. Williams. The objects of the study are oat varieties included in the list of breeding achievements approved for use in the Krasnoyarsk Region and promising for use: Tubinsky, Sig, Sayan, Uzhursky, Ural 2, Krasnoobsky and Poloves. Control is single cutting use and Tubinsky variety. The energy content depended on the method of use and type of product. The energy content of dry matter of green mass averaged 9.681 MJ/kg; energy content of grain with double mowing - 13.003; with a single mowing -13.515 MJ/kg. In the forest-steppe conditions of the Krasnoyarsk Region, the energy content of oat varieties corresponded to the first quality class. In terms of energy content of dry matter of green mass, the Tubinsky variety Sayan was superior to the control. The dry matter energy content of this variety averaged 11.133 MJ/ha. The energy productivity of oats depended on the variety, weather conditions of the years of research and energy content. In terms of energy productivity, all studied varieties showed an advantage when used with double-cutting compared to single-cutting. The maximum increase in single cutting use was shown by the Sig variety, which exceeded the control by 127.1 %. The Sayan variety stood out in terms of energy productivity; its increase per cutting was 60.2 GJ/ha.