Influence of microfertilizers of the Izagri series on the productivity of safflower (Carthamus tinctorius)

The results of the analysis of the influence of Izagri microelement fertilizers on safflower productivity in the forest-steppe conditions of the Middle Volga region are presented. The studies were conducted in 2020-2022 in the Penza region (experimental field of the Penza Research Institute of Agriculture). The object of the study was safflower of the Ershovsky 4 variety. The experiment consisted in pre-sowing seed treatment with Izagri series of microfertilizers. Izagri preparations were found to increase the growth force of seeds up to 1.21-1.57 cm, germination by 1.1-8.8%, safety of plants for harvesting by 0.5-6.2%. Against the background of fertilizer application, safflower productivity averaged 1.30-1.55 t/ha for 3 years, i.e. increased by 0.06-0.25 t/ha. The greatest effect was produced by Izagri Force and Izagri Vita, which helped to obtain a yield increase of 0.23-0.25 t/ha. The highest oil content of seeds was observed in the variants with Izagri Azot (29.85%) and Izagri Bor (30.04%): the increase was 2.7 and 3.0% respectively. Application of these preparations reduced seed huskiness to 37.7 and 37.9%, respectively. The largest seeds were formed in the variant with Izagri Vita - weight of 1 thousand seeds was 39.16 g. Treatment with Izagri Phosphorus and Izagri Vita gave a slight decrease in oleic acid content (to 9.94 and 9.62%). At the same time, the use of Izagri Vita maximized the amount of linoleic acid (up to 83.63%). After using Izagri Force, the concentration of this acid decreased to 81.88%. Based on the data obtained, it can be concluded that pre-sowing treatment of seeds with microfertilizers from Izagri line improves the quality indicators of oilseeds and can act as a method to increase the productivity of safflower.

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