Technological aspects of confectionary sunflower cultivation in arid conditions of the Crimean peninsula

Abstract

The reaction of large-fruited confectionary sunflower of the LFS variety to different plant density was studied in 2017-2019 in southern slightly humic chernozem in the arid conditions of the steppe zone of Crimea. It was established that the minimum plant stand within the limits of optimal density, which is not more than 30 thousand plants/ha in the climatic conditions during the years of study, allowed obtaining yield within the limits of 1.17–2.38 t/ha with seed oil content of 39.0-46.3 %. With the overcrowding of crops from 30 to 40 thousand pcs/ha, there was a tendency to decrease the indicators of structural elements of crops and the productivity of crops in general. In order to obtain large seeds (102.1–114.0 g), the optimal plant density shall be 20 thousand/ha. The maximum yield of seeds is achieved in crops with plant density of 30 thousand/ha, but the thousand-seed weight under this technology is reduced to 92.4–103.2 g.