Responsibility of sunflower hybrids to minimize the main tillage of soil in the Trans-Volga region
The Agrarian Scientific Journal
Peculiarities of changes in soil moisture at various methods of main tillage before sunflower sowing and in the phase of "beginning of flowering" are considered. As a result of two-year observations, it was established that, in the arid conditions of the Saratov Trans-Volga region, before the sunflower sowing, the maximum soil moisture of a layer of 50–100 cm was after non-mold deep cultivation, which exceeded the plowing by 0.2–0.7%, and the minimum one by 0.7– 2.0% of the mass of absolutely
... ass of absolutely dry soil. In the phenological phase of the "beginning of flowering", the best water regime was in 2018 after treatment with SSD-4 by 30–32 cm, and in 2019 in the control 1. Minimization of the main tillage reduces the yield of sunflower oilseeds in comparison with the dump cultivation by 32.8–46.2%. Deep subsurface cultivation increases the productivity of sunflower by 3.1–7.5%. The most productive sunflower hybrids for the Saratov Trans-Volga region are from the group of early ripening crops - Svetoch (1.56 t / ha), mid-early - the EU Savana (1.63 t/ha), mid-ripening EU Generalis SL (1.47 t/ha).